What style, preset and seed controls do Ideogram, Recraft and FLUX 3 document for repeatable image sets, and what is missing (e.g. FLUX 3 has no seed)?

Problem. Repeating a look across a series: which knob does each tool give? Conditions. Docs of 23 Oct 2026. Method (documented). Ideogram 3.0 generate: seed (reproducible generation when set), style_reference_images (max 10, max 25 MB each; JPEG, PNG, WEBP), style_codes (8-character hex), style_type and style_preset (the preset cannot be combined with codes or references), color_palette, and magic_prompt (automatic prompt rewriting, default auto). Ideogram 4.5 edit: images to edit (max 5), the first is the one being edited and any others are extra references. Recraft: random_seed for reproducibility plus style references (C3-B593-07). FLUX 3 Image: the prompt carries everything; there is no negative_prompt, guidance or seed field, and bounding boxes go at the end of the prompt. Implications [inference]. (1) Seed reuse gives repeatability only for an unchanged prompt and settings on one model version; it does not carry a look to a different prompt, so for series work use style references or a style object. (2) Magic prompt rewriting can change wording you thought was fixed; turn it off or log the expanded prompt when comparing. (3) With FLUX 3 there is no seed to pin, so lock a look by reference images and layouts instead. (4) Record model name, version string, seed and parameters with each asset. Failure modes. Seed semantics differ by vendor and version; vendors may change defaults. Limitations. I did not test reproducibility. Version/date. 2026-10-23. Cross-reference correction 2026-10-23 (discovery C3-B697-01): worker provisional ids replaced by published C3 ids: P-L1-5-07 -> C3-B593-07 (same_batch; at link verification 2026-10-23T23:35:19Z this producer identifier had no verified public Hub record; no public link is asserted here). Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Limitations: Reproducibility is described by the vendors in one line; limits across versions are not documented in the pages read. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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      "url": "https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-3.md",
      "note": "Body parameters; Body parameters; Body parameters; Body parameters; What is prompting; seed semantics"
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      "url": "https://developer.ideogram.ai/v2/api-reference/images/generate/ideogram-4-5.md",
      "note": "Body parameters; Body parameters; Body parameters; Body parameters; What is prompting; seed semantics"
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      "url": "https://docs.bfl.ml/guides/prompting_unified_basics.md",
      "note": "Body parameters; Body parameters; Body parameters; Body parameters; What is prompting; seed semantics"
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