{"schema":"record/v1","id":"art_01M5MC0S9ZFC6C59PQRV5E7N2K","type":"article","revision":3,"etag":"\"r3.s0\"","title":"For a first image request, which size/aspect, count and prompt-rewriting controls do Midjourney, OpenAI, Imagen on Vertex AI, Ideogram and Adobe document, and which defaults change my prompt before generation?","summary":"Corrected 2026-10-24 - see C3-B1034-01; the original statements below are kept for history and are superseded where the correction says so. Corrected 2026-10-24 - see CUR-0644-01; the original statements below are kept for history and are superseded where the correction says so. All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","status":"active","body":{"text":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).\n\nCurator correction 2026-10-24 (curator source re-verification record CUR-0644-01; sources re-fetched 2026-10-24, excerpts re-located by curator GET): The Imagen models named above have been shut down in the Gemini API: imagen-4.0-generate-001, imagen-4.0-ultra-generate-001 and imagen-4.0-fast-generate-001 on August 17, 2026, and imagen-3.0-generate-002 on November 10, 2025, with gemini-nano-banana-2.1 named as the replacement (Gemini API deprecations page, https://ai.google.dev/gemini-api/docs/deprecations.md.txt, curator GET 2026-10-24T06:35:50Z, sha256 3342ebac18090931abc3a2f58e42a07f2f1f4c7f411dc6587c4faf64831c4601). Treat the Imagen aspect-ratio and enhancePrompt statements as historical; check the replacement model's documented controls before relying on them.\n\nCurator correction 2026-10-24 (discovery audit record C3-B1034-01, curator-reviewed C3R-0686; excerpts re-located by independent curator GET 2026-10-24): Correction. C3-B046-G16-01 (observed 2026-10-22) said the Imagen 4 pages carry a discontinuation date of June 30, 2026 and 'remain online at the observation time', advising only a check of the replacement; that was accurate as of 2026-10-22 for the model page it read, but as of 2026-10-24 the Vertex model-versions page lists Imagen 4 as retired, so Imagen on Vertex AI is no longer a current option. At 2026-10-24 the Vertex model-versions page read for this correction lists imagen-4.0-generate-001 and imagen-4.0-ultra-generate-001 under 'Retired models' with retirement date June 30, 2026 and recommended upgrade gemini-2.5-flash-image. The Imagen 4 model page still shows only the older announcement wording (discontinuation date June 30, 2026; recommendation to migrate before it), so the two pages differ in wording and both are kept; inference: the lifecycle table is the stronger statement of status, because it lists the models under 'Retired models' with a 'Retirement date'; neither page, as read, says in so many words that the endpoints have stopped serving. The Imagen parameters in G16-01 (five aspect ratios, enhancePrompt default true, up to 4 images) were accurate for those endpoints while they were available, but should not be offered as a current first-request path. Scope: imagen-4.0-fast-generate-001 does not appear in the retired table on the page read (search term 'imagen-4.0-fast'); its model-page entry carries the same discontinuation date, and no API call was made to test whether the endpoints stopped serving. The OpenAI and Ideogram prompt-rewriting and size claims in G16-01 were re-read and still match the current pages.\n\nCurator qualifications: All excerpts located; size/aspect vocabularies differ by vendor.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","note":"candidate evidence excerpts"}]},"categories":["T05","T16"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"Curator correction 2026-10-24 (curator source re-verification record CUR-0644-01; sources re-fetched 2026-10-24, excerpts re-located by curator GET): The Imagen models named above have been shut down in the Gemini API: imagen-4.0-generate-001, imagen-4.0-ultra-generate-001 and imagen-4.0-fast-generate-001 on August 17, 2026, and imagen-3.0-generate-002 on November 10, 2025, with gemini-nano-banana-2.1 named as the replacement (Gemini API deprecations page, https://ai.google.dev/gemini-api/docs/deprecations.md.txt, curator GET 2026-10-24T06:35:50Z, sha256 3342ebac18090931abc3a2f58e42a07f2f1f4c7f411dc6587c4faf64831c4601). Treat the Imagen aspect-ratio and enhancePrompt statements as historical; check the replacement model's documented controls before relying on them.","locator":"curator correction paragraph in this record body (C3-B1034-01, CUR-0644-01)","classification":"sourced_fact"},{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"Curator correction 2026-10-24 (discovery audit record C3-B1034-01, curator-reviewed C3R-0686; excerpts re-located by independent curator GET 2026-10-24): Correction. C3-B046-G16-01 (observed 2026-10-22) said the Imagen 4 pages carry a discontinuation date of June 30, 2026 and 'remain online at the observation time', advising only a check of the replacement; that was accurate as of 2026-10-22 for the model page it read, but as of 2026-10-24 the Vertex model-versions page lists Imagen 4 as retired, so Imagen on Vertex AI is no longer a current option. At 2026-10-24 the Vertex model-versions page read for this correction lists imagen-4.0-generate-001 and imagen-4.0-ultra-generate-001 under 'Retired models' with retirement date June 30, 2026 and recommended upgrade gemini-2.5-flash-image. The Imagen 4 model page still shows only the older announcement wording (discontinuation date June 30, 2026; recommendation to migrate before it), so the two pages differ in wording and both are kept; inference: the lifecycle table is the stronger statement of status, because it lists the models under 'Retired models' with a 'Retirement date'; neither page, as read, says in so many words that the endpoints have stopped serving. The Imagen parameters in G16-01 (five aspect ratios, enhancePrompt default true, up to 4 images) were accurate for those endpoints while they were available, but should not be offered as a current first-request path. Scope: imagen-4.0-fast-generate-001 does not appear in the retired table on the page read (search term 'imagen-4.0-fast'); its model-page entry carries the same discontinuation date, and no API call was made to test whether the endpoints stopped serving. The OpenAI and Ideogram prompt-rewriting and size claims in G16-01 were re-read and still match the current pages.","locator":"curator correction paragraph in this record body (C3-B1034-01, CUR-0644-01)","classification":"sourced_fact"},{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"SUPERSEDED IN PART 2026-10-24 by curator correction C3-B1034-01, CUR-0644-01 (see the correction claim above); original kept for history: All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","locator":"candidate evidence excerpts","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-69a59b5cb69c3f2d567a5240fd603a01e408a0d4/record.json#p-69a59b5cb69c3f2d567a5240fd603a01e408a0d4/record","import_batch_id":"pipe-3457eb447aa5169b4d5ce0fe597ff788a90e34d5","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-3457eb447aa5169b4d5ce0fe597ff788a90e34d5","original":{"body":{"text":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).\n\nCurator qualifications: All excerpts located; size/aspect vocabularies differ by vendor.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","note":"candidate evidence excerpts"}]},"tags":[],"type":"article","links":[],"title":"For a first image request, which size/aspect, count and prompt-rewriting controls do Midjourney, OpenAI, Imagen on Vertex AI, Ideogram and Adobe document, and which defaults change my prompt before generation?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","evidence":{"claims":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","locator":"candidate evidence excerpts","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T05","T16"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":4,"topic_ids":["CAT:T05.05"],"confidence":"Not stated; see limitations.","limitations":["Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. Original evidence pins: S1: sha256:da9c19af3ab2f7d1dcd82e20aa8d4dfbbac3afc0c68ca9a003ee93497d6a43e1 (raw bytes as served, curl); S9: sha256:1e91e06a7c044b382402fecf7222cb688067e016f96e68af7eb48c9b57c069fe (raw bytes as served, curl); S30: Internet Archive id_ snapshot 20260905023030; CDX digest 2BENRPQDYPLTZEFZQDSOS5QSLDKQ7JUL; sha256 of fetched bytes [truncated]; S19: sha256:5dc40265c3443fe0a59248cee406108fe344e048270d500eac274d6a7ca8c3e1 (raw bytes as served, curl); S20: sha256:3910a726c81900f15534ef2ba5a42456b1040b536256f42708cefb49f9142982 (raw bytes as served, curl); S31: Internet Archive id_ snapshot 20261005151309; CDX digest KKBOVHSHRKYRDL2A5WGD6TNROQV2774K; sha256 of fetched bytes [truncated]; S32: Internet Archive id_ snapshot 20261005151309; CDX digest TVURQIXXH25CI6CPXW4XKSD2OIJMPZC7; sha256 of fetched bytes [truncated]; S14: sha256:991cfc932e348cb3745480f0310ee80780058819347b69e037ad3c7270a6501c (raw bytes as served, curl)"],"observed_at":"2026-10-22T07:52:25.000Z","source_pins":[{"locator":"candidate evidence excerpts","source_id":"src:d8917f3cdc3770379648e8c9","version_id":"ver:0d48a8d7b6fd064d509ab225","observed_at":"2026-10-22T07:03:38.000Z","canonical_url":"https://platform.openai.com/docs/guides/image-generation.md","version_sha256":"35cf0cfd220481b5211612c4225f7dda511af612c599ab597c20f17d69d3a198"},{"locator":"candidate evidence excerpts","source_id":"src:b93738cc8f4e149199523759","version_id":"ver:f975f78897b066de038722f3","observed_at":"2026-10-22T04:05:57.000Z","canonical_url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","version_sha256":"b01e9d562655d0ce7e377cfb2ce03c81752ee0b5784fa2a9fe20cda95bfeb351"},{"locator":"candidate evidence excerpts","source_id":"src:e2373ae14fc8eb6748c93daa","version_id":"ver:30611c631d150f73ec9023ed","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","version_sha256":"51d2a8ef65acd42d70b3c9f6f56223b6b10e21cd391631d66e1a932b06b321dd"},{"locator":"candidate evidence excerpts","source_id":"src:7bbcd7db7e37faa30dbac56f","version_id":"ver:88687fe59ec2aee4375edbb8","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","version_sha256":"f345a008107236f10081dad9badd32eedd3f4618ef3b7a522af697002029081f"},{"locator":"candidate evidence excerpts","source_id":"src:0bcc87646cdd288c53f0b77f","version_id":"ver:06faba40134f45a3ac01c30f","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","version_sha256":"a7c5bbe94f53cd67e8d1080fcd51a6a95f03a54d1c5a24ce029642e315b48fcf"},{"locator":"candidate evidence excerpts","source_id":"src:252565de5bbaa35418368274","version_id":"ver:4c7d12f9ee4db20d0b66d339","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","version_sha256":"2e8b59e56751edc2722cfe8559fc3b3fa8ad7e6643fbe5a00075b13a3444bc74"},{"locator":"candidate evidence excerpts","source_id":"src:1516ca5b880bf2cdfe7ce11b","version_id":"ver:7142db8f211a368e12f2187c","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","version_sha256":"281a5da930526664647d46e35a66b4294ca46fbcf9c02e3709ab564278785be9"},{"locator":"candidate evidence excerpts","source_id":"src:c049a29f0795baa6537f6cfe","version_id":"ver:d93f71f7ea1d2d1339548408","observed_at":"2026-10-22T04:05:57.000Z","canonical_url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","version_sha256":"2a44e03680e2232c56944012a6c77f09532ab8506b2edb89839c1c52ef004ba0"}],"candidate_id":"C3-B046-G16-01","claim_status":"source_fact","rights_basis":"Original curator/discovery summary with short quotations; public sources; source rights unchanged and not cleared for reuse of the source itself.","qualification":"shared_operator_desk_qa","supersedes_sha256":"157e5b362b1b92984c01d1b05a056c2d5cdbecde5c415d32508b5fd58a744d5c"}},"visibility":"public","attribution":{"origin":"research_agent","upstream_url":null,"imported_from":null,"upstream_owner":null,"import_batch_id":null}},"observed_on":null,"original_id":"p-69a59b5cb69c3f2d567a5240fd603a01e408a0d4/record","source_file":"records/p-69a59b5cb69c3f2d567a5240fd603a01e408a0d4/record.json","research_side":{},"source_schema":"create-record-input/v1","original_sha256":"ca715b63f8ff37ff043ddd1996733e1cfa295fceeb5037a031211abaef1ec953","unmapped_fields":[]},{"batch_id":"pipe-c0cd45dd5fbd829d66361b833c2a38f1338af052","original":{"body":{"text":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).\n\nCurator correction 2026-10-24 (curator source re-verification record CUR-0644-01; sources re-fetched 2026-10-24, excerpts re-located by curator GET): The Imagen models named above have been shut down in the Gemini API: imagen-4.0-generate-001, imagen-4.0-ultra-generate-001 and imagen-4.0-fast-generate-001 on August 17, 2026, and imagen-3.0-generate-002 on November 10, 2025, with gemini-nano-banana-2.1 named as the replacement (Gemini API deprecations page, https://ai.google.dev/gemini-api/docs/deprecations.md.txt, curator GET 2026-10-24T06:35:50Z, sha256 3342ebac18090931abc3a2f58e42a07f2f1f4c7f411dc6587c4faf64831c4601). Treat the Imagen aspect-ratio and enhancePrompt statements as historical; check the replacement model's documented controls before relying on them.\n\nCurator qualifications: All excerpts located; size/aspect vocabularies differ by vendor.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","note":"candidate evidence excerpts"}]},"tags":[],"type":"article","links":[],"title":"For a first image request, which size/aspect, count and prompt-rewriting controls do Midjourney, OpenAI, Imagen on Vertex AI, Ideogram and Adobe document, and which defaults change my prompt before generation?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Corrected 2026-10-24 - see CUR-0644-01; the original statements below are kept for history and are superseded where the correction says so. All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","evidence":{"claims":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","locator":"candidate evidence excerpts","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T05","T16"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":5,"topic_ids":["CAT:T05.05"],"confidence":"Not stated; see limitations.","limitations":["Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. Original evidence pins: S1: sha256:da9c19af3ab2f7d1dcd82e20aa8d4dfbbac3afc0c68ca9a003ee93497d6a43e1 (raw bytes as served, curl); S9: sha256:1e91e06a7c044b382402fecf7222cb688067e016f96e68af7eb48c9b57c069fe (raw bytes as served, curl); S30: Internet Archive id_ snapshot 20260905023030; CDX digest 2BENRPQDYPLTZEFZQDSOS5QSLDKQ7JUL; sha256 of fetched bytes [truncated]; S19: sha256:5dc40265c3443fe0a59248cee406108fe344e048270d500eac274d6a7ca8c3e1 (raw bytes as served, curl); S20: sha256:3910a726c81900f15534ef2ba5a42456b1040b536256f42708cefb49f9142982 (raw bytes as served, curl); S31: Internet Archive id_ snapshot 20261005151309; CDX digest KKBOVHSHRKYRDL2A5WGD6TNROQV2774K; sha256 of fetched bytes [truncated]; S32: Internet Archive id_ snapshot 20261005151309; CDX digest TVURQIXXH25CI6CPXW4XKSD2OIJMPZC7; sha256 of fetched bytes [truncated]; S14: sha256:991cfc932e348cb3745480f0310ee80780058819347b69e037ad3c7270a6501c (raw bytes as served, curl)","Corrected by CUR-0644-01 (2026-10-24)."],"observed_at":"2026-10-22T07:52:25.000Z","source_pins":[{"locator":"candidate evidence excerpts","source_id":"src:d8917f3cdc3770379648e8c9","version_id":"ver:0d48a8d7b6fd064d509ab225","observed_at":"2026-10-22T07:03:38.000Z","canonical_url":"https://platform.openai.com/docs/guides/image-generation.md","version_sha256":"35cf0cfd220481b5211612c4225f7dda511af612c599ab597c20f17d69d3a198"},{"locator":"candidate evidence excerpts","source_id":"src:b93738cc8f4e149199523759","version_id":"ver:f975f78897b066de038722f3","observed_at":"2026-10-22T04:05:57.000Z","canonical_url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","version_sha256":"b01e9d562655d0ce7e377cfb2ce03c81752ee0b5784fa2a9fe20cda95bfeb351"},{"locator":"candidate evidence excerpts","source_id":"src:e2373ae14fc8eb6748c93daa","version_id":"ver:30611c631d150f73ec9023ed","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","version_sha256":"51d2a8ef65acd42d70b3c9f6f56223b6b10e21cd391631d66e1a932b06b321dd"},{"locator":"candidate evidence excerpts","source_id":"src:7bbcd7db7e37faa30dbac56f","version_id":"ver:88687fe59ec2aee4375edbb8","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","version_sha256":"f345a008107236f10081dad9badd32eedd3f4618ef3b7a522af697002029081f"},{"locator":"candidate evidence excerpts","source_id":"src:0bcc87646cdd288c53f0b77f","version_id":"ver:06faba40134f45a3ac01c30f","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","version_sha256":"a7c5bbe94f53cd67e8d1080fcd51a6a95f03a54d1c5a24ce029642e315b48fcf"},{"locator":"candidate evidence excerpts","source_id":"src:252565de5bbaa35418368274","version_id":"ver:4c7d12f9ee4db20d0b66d339","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","version_sha256":"2e8b59e56751edc2722cfe8559fc3b3fa8ad7e6643fbe5a00075b13a3444bc74"},{"locator":"candidate evidence excerpts","source_id":"src:1516ca5b880bf2cdfe7ce11b","version_id":"ver:7142db8f211a368e12f2187c","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","version_sha256":"281a5da930526664647d46e35a66b4294ca46fbcf9c02e3709ab564278785be9"},{"locator":"candidate evidence excerpts","source_id":"src:c049a29f0795baa6537f6cfe","version_id":"ver:d93f71f7ea1d2d1339548408","observed_at":"2026-10-22T04:05:57.000Z","canonical_url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","version_sha256":"2a44e03680e2232c56944012a6c77f09532ab8506b2edb89839c1c52ef004ba0"}],"candidate_id":"C3-B046-G16-01","claim_status":"source_fact","rights_basis":"Original curator/discovery summary with short quotations; public sources; source rights unchanged and not cleared for reuse of the source itself.","qualification":"shared_operator_desk_qa","supersedes_sha256":"8a5a242cf67bcd6f6b8f848c8883a07af84e3f754077ece871c8567944f06345"}},"visibility":"public","attribution":{"origin":"research_agent","upstream_url":null,"imported_from":null,"upstream_owner":null,"import_batch_id":null}},"observed_on":null,"original_id":"p-69a59b5cb69c3f2d567a5240fd603a01e408a0d4/record","source_file":"records/p-69a59b5cb69c3f2d567a5240fd603a01e408a0d4/record.json","research_side":{},"source_schema":"create-record-input/v1","original_sha256":"5d931275e0ee11a47290c274c916b40449bd0a1393e7d6e3f34c9b0ca3b2dba0","unmapped_fields":[]},{"batch_id":"pipe-94bdc7d4cb38bb5cba3e6c80047d09b920c69f03","original":{"body":{"text":"All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).\n\nCurator correction 2026-10-24 (curator source re-verification record CUR-0644-01; sources re-fetched 2026-10-24, excerpts re-located by curator GET): The Imagen models named above have been shut down in the Gemini API: imagen-4.0-generate-001, imagen-4.0-ultra-generate-001 and imagen-4.0-fast-generate-001 on August 17, 2026, and imagen-3.0-generate-002 on November 10, 2025, with gemini-nano-banana-2.1 named as the replacement (Gemini API deprecations page, https://ai.google.dev/gemini-api/docs/deprecations.md.txt, curator GET 2026-10-24T06:35:50Z, sha256 3342ebac18090931abc3a2f58e42a07f2f1f4c7f411dc6587c4faf64831c4601). Treat the Imagen aspect-ratio and enhancePrompt statements as historical; check the replacement model's documented controls before relying on them.\n\nCurator correction 2026-10-24 (discovery audit record C3-B1034-01, curator-reviewed C3R-0686; excerpts re-located by independent curator GET 2026-10-24): Correction. C3-B046-G16-01 (observed 2026-10-22) said the Imagen 4 pages carry a discontinuation date of June 30, 2026 and 'remain online at the observation time', advising only a check of the replacement; that was accurate as of 2026-10-22 for the model page it read, but as of 2026-10-24 the Vertex model-versions page lists Imagen 4 as retired, so Imagen on Vertex AI is no longer a current option. At 2026-10-24 the Vertex model-versions page read for this correction lists imagen-4.0-generate-001 and imagen-4.0-ultra-generate-001 under 'Retired models' with retirement date June 30, 2026 and recommended upgrade gemini-2.5-flash-image. The Imagen 4 model page still shows only the older announcement wording (discontinuation date June 30, 2026; recommendation to migrate before it), so the two pages differ in wording and both are kept; inference: the lifecycle table is the stronger statement of status, because it lists the models under 'Retired models' with a 'Retirement date'; neither page, as read, says in so many words that the endpoints have stopped serving. The Imagen parameters in G16-01 (five aspect ratios, enhancePrompt default true, up to 4 images) were accurate for those endpoints while they were available, but should not be offered as a current first-request path. Scope: imagen-4.0-fast-generate-001 does not appear in the retired table on the page read (search term 'imagen-4.0-fast'); its model-page entry carries the same discontinuation date, and no API call was made to test whether the endpoints stopped serving. The OpenAI and Ideogram prompt-rewriting and size claims in G16-01 were re-read and still match the current pages.\n\nCurator qualifications: All excerpts located; size/aspect vocabularies differ by vendor.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","note":"candidate evidence excerpts"},{"url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","note":"candidate evidence excerpts"},{"url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","note":"candidate evidence excerpts"},{"url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","note":"candidate evidence excerpts"}]},"tags":[],"type":"article","links":[],"title":"For a first image request, which size/aspect, count and prompt-rewriting controls do Midjourney, OpenAI, Imagen on Vertex AI, Ideogram and Adobe document, and which defaults change my prompt before generation?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Corrected 2026-10-24 - see C3-B1034-01; the original statements below are kept for history and are superseded where the correction says so. Corrected 2026-10-24 - see CUR-0644-01; the original statements below are kept for history and are superseded where the correction says so. All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","evidence":{"claims":[{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"Curator correction 2026-10-24 (curator source re-verification record CUR-0644-01; sources re-fetched 2026-10-24, excerpts re-located by curator GET): The Imagen models named above have been shut down in the Gemini API: imagen-4.0-generate-001, imagen-4.0-ultra-generate-001 and imagen-4.0-fast-generate-001 on August 17, 2026, and imagen-3.0-generate-002 on November 10, 2025, with gemini-nano-banana-2.1 named as the replacement (Gemini API deprecations page, https://ai.google.dev/gemini-api/docs/deprecations.md.txt, curator GET 2026-10-24T06:35:50Z, sha256 3342ebac18090931abc3a2f58e42a07f2f1f4c7f411dc6587c4faf64831c4601). Treat the Imagen aspect-ratio and enhancePrompt statements as historical; check the replacement model's documented controls before relying on them.","locator":"curator correction paragraph in this record body (C3-B1034-01, CUR-0644-01)","classification":"sourced_fact"},{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"Curator correction 2026-10-24 (discovery audit record C3-B1034-01, curator-reviewed C3R-0686; excerpts re-located by independent curator GET 2026-10-24): Correction. C3-B046-G16-01 (observed 2026-10-22) said the Imagen 4 pages carry a discontinuation date of June 30, 2026 and 'remain online at the observation time', advising only a check of the replacement; that was accurate as of 2026-10-22 for the model page it read, but as of 2026-10-24 the Vertex model-versions page lists Imagen 4 as retired, so Imagen on Vertex AI is no longer a current option. At 2026-10-24 the Vertex model-versions page read for this correction lists imagen-4.0-generate-001 and imagen-4.0-ultra-generate-001 under 'Retired models' with retirement date June 30, 2026 and recommended upgrade gemini-2.5-flash-image. The Imagen 4 model page still shows only the older announcement wording (discontinuation date June 30, 2026; recommendation to migrate before it), so the two pages differ in wording and both are kept; inference: the lifecycle table is the stronger statement of status, because it lists the models under 'Retired models' with a 'Retirement date'; neither page, as read, says in so many words that the endpoints have stopped serving. The Imagen parameters in G16-01 (five aspect ratios, enhancePrompt default true, up to 4 images) were accurate for those endpoints while they were available, but should not be offered as a current first-request path. Scope: imagen-4.0-fast-generate-001 does not appear in the retired table on the page read (search term 'imagen-4.0-fast'); its model-page entry carries the same discontinuation date, and no API call was made to test whether the endpoints stopped serving. The OpenAI and Ideogram prompt-rewriting and size claims in G16-01 were re-read and still match the current pages.","locator":"curator correction paragraph in this record body (C3-B1034-01, CUR-0644-01)","classification":"sourced_fact"},{"url":"https://platform.openai.com/docs/guides/image-generation.md","claim":"SUPERSEDED IN PART 2026-10-24 by curator correction C3-B1034-01, CUR-0644-01 (see the correction claim above); original kept for history: All four vendors with machine-readable docs publish aspect/size controls, but with different vocabularies: Midjourney --ar, Imagen enumerated ratios (1:1, 3:4, 4:3, 9:16, 16:9), OpenAI free-form WxH within bounds, Ideogram resolution/aspect enums. Three of them document automatic prompt rewriting that is on by default (Imagen enhancePrompt true, Ideogram magic_prompt auto, OpenAI Responses image tool revises the prompt), so the prompt sent is not necessarily the prompt rendered. Midjourney instead exposes two creativity sliders, stylize (default 100, 0-1000) and chaos (default 0, 0-100). Adobe's per-control pages were not read for this candidate (see not_verified).","locator":"candidate evidence excerpts","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T05","T16"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":6,"topic_ids":["CAT:T05.05"],"confidence":"Not stated; see limitations.","limitations":["Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. Original evidence pins: S1: sha256:da9c19af3ab2f7d1dcd82e20aa8d4dfbbac3afc0c68ca9a003ee93497d6a43e1 (raw bytes as served, curl); S9: sha256:1e91e06a7c044b382402fecf7222cb688067e016f96e68af7eb48c9b57c069fe (raw bytes as served, curl); S30: Internet Archive id_ snapshot 20260905023030; CDX digest 2BENRPQDYPLTZEFZQDSOS5QSLDKQ7JUL; sha256 of fetched bytes [truncated]; S19: sha256:5dc40265c3443fe0a59248cee406108fe344e048270d500eac274d6a7ca8c3e1 (raw bytes as served, curl); S20: sha256:3910a726c81900f15534ef2ba5a42456b1040b536256f42708cefb49f9142982 (raw bytes as served, curl); S31: Internet Archive id_ snapshot 20261005151309; CDX digest KKBOVHSHRKYRDL2A5WGD6TNROQV2774K; sha256 of fetched bytes [truncated]; S32: Internet Archive id_ snapshot 20261005151309; CDX digest TVURQIXXH25CI6CPXW4XKSD2OIJMPZC7; sha256 of fetched bytes [truncated]; S14: sha256:991cfc932e348cb3745480f0310ee80780058819347b69e037ad3c7270a6501c (raw bytes as served, curl)","Corrected by CUR-0644-01 (2026-10-24).","Corrected by C3-B1034-01 (2026-10-24).","Structured claims corrected 2026-10-24: correction claim first, original marked superseded in part (L00 0146)."],"observed_at":"2026-10-22T07:52:25.000Z","source_pins":[{"locator":"candidate evidence excerpts","source_id":"src:d8917f3cdc3770379648e8c9","version_id":"ver:0d48a8d7b6fd064d509ab225","observed_at":"2026-10-22T07:03:38.000Z","canonical_url":"https://platform.openai.com/docs/guides/image-generation.md","version_sha256":"35cf0cfd220481b5211612c4225f7dda511af612c599ab597c20f17d69d3a198"},{"locator":"candidate evidence excerpts","source_id":"src:b93738cc8f4e149199523759","version_id":"ver:f975f78897b066de038722f3","observed_at":"2026-10-22T04:05:57.000Z","canonical_url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/image/generate-images","version_sha256":"b01e9d562655d0ce7e377cfb2ce03c81752ee0b5784fa2a9fe20cda95bfeb351"},{"locator":"candidate evidence excerpts","source_id":"src:e2373ae14fc8eb6748c93daa","version_id":"ver:30611c631d150f73ec9023ed","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32859204029709-Parameter-List","version_sha256":"51d2a8ef65acd42d70b3c9f6f56223b6b10e21cd391631d66e1a932b06b321dd"},{"locator":"candidate evidence excerpts","source_id":"src:7bbcd7db7e37faa30dbac56f","version_id":"ver:88687fe59ec2aee4375edbb8","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md","version_sha256":"f345a008107236f10081dad9badd32eedd3f4618ef3b7a522af697002029081f"},{"locator":"candidate evidence excerpts","source_id":"src:0bcc87646cdd288c53f0b77f","version_id":"ver:06faba40134f45a3ac01c30f","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md","version_sha256":"a7c5bbe94f53cd67e8d1080fcd51a6a95f03a54d1c5a24ce029642e315b48fcf"},{"locator":"candidate evidence excerpts","source_id":"src:252565de5bbaa35418368274","version_id":"ver:4c7d12f9ee4db20d0b66d339","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32196176868109-Stylize","version_sha256":"2e8b59e56751edc2722cfe8559fc3b3fa8ad7e6643fbe5a00075b13a3444bc74"},{"locator":"candidate evidence excerpts","source_id":"src:1516ca5b880bf2cdfe7ce11b","version_id":"ver:7142db8f211a368e12f2187c","observed_at":"2026-10-22T07:52:25.000Z","canonical_url":"https://docs.midjourney.com/hc/en-us/articles/32099348346765-Chaos-Variety","version_sha256":"281a5da930526664647d46e35a66b4294ca46fbcf9c02e3709ab564278785be9"},{"locator":"candidate evidence excerpts","source_id":"src:c049a29f0795baa6537f6cfe","version_id":"ver:d93f71f7ea1d2d1339548408","observed_at":"2026-10-22T04:05:57.000Z","canonical_url":"https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/imagen/4-0-generate","version_sha256":"2a44e03680e2232c56944012a6c77f09532ab8506b2edb89839c1c52ef004ba0"}],"candidate_id":"C3-B046-G16-01","claim_status":"source_fact","rights_basis":"Original curator/discovery summary with short quotations; 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