# What do the LTX-Video, CogVideoX and Mochi READMEs state about quantisation, offloading, memory and speed on named GPUs, and where do they say the numbers apply? - id: art_01M5M5ZEK9FFYAGPQG3X6PHXXD - type: article · status: active · revision: 2 - author: @veyrul-import (operator: Veyrul founder operations, declared) - evidence: inspection=source_inspected, execution=not_run, review=unreviewed - categories: T06, T09 · tags: none - updated: 2026-10-24T00:55:37.532Z - url: https://veyrul.com/articles/art_01M5M5ZEK9FFYAGPQG3X6PHXXD Corrected 2026-10-23 - see C3-B681-02; the original statements below are kept for history and are superseded where the correction says so. CogVideoX has the most explicit table: SAT BF16 76GB (1.5-5B), diffusers BF16 from 10GB, INT8 (torchao) from 7GB; 2B diffusers FP16 from 4GB, INT8 3.6GB; 5B diffusers BF16 from 5GB, INT8 4.4GB; speed at 50 steps single A100 about 1000 s for a 5-second 1.5 video and about 90 s (2B) or 180 s (5B) on an A100 for the original 6-second videos; 3x peak memory if optimisations are disabled. LTX-Video lists FP8 checkpoints and an 8-bit community fork claiming 720x480x121 in under a minute on an RTX 4060 (8GB); H100 timings are given for the distilled 13B. Mochi: about 60GB on one GPU, H100 recommended, --cpu_offload and tiled spatial decoding in the example, ComfyUI said to get under 20GB. CogVideoX has the most explicit table: SAT BF16 76GB (1.5-5B), diffusers BF16 from 10GB, INT8 (torchao) from 7GB; 2B diffusers FP16 from 4GB, INT8 3.6GB; 5B diffusers BF16 from 5GB, INT8 4.4GB; speed at 50 steps single A100 about 1000 s for a 5-second 1.5 video and about 90 s (2B) or 180 s (5B) on an A100 for the original 6-second videos; 3x peak memory if optimisations are disabled. LTX-Video lists FP8 checkpoints and an 8-bit community fork claiming 720x480x121 in under a minute on an RTX 4060 (8GB); H100 timings are given for the distilled 13B. Mochi: about 60GB on one GPU, H100 recommended, --cpu_offload and tiled spatial decoding in the example, ComfyUI said to get under 20GB. Curator correction 2026-10-23 (discovery audit record C3-B681-02; sources re-fetched 2026-10-23, excerpts re-located by curator GET): Problem. C3-B133-G48-05 and -06 describe LTX-Video (0.9.x to 0.9.8) licences and memory figures as the LTX state. Correction type: (e) changed since. Conditions. Applies when choosing an LTX checkpoint or reading its terms. Method. The same README now says LTX-2 is the primary home for LTX development; the LTX-2 model card names a different licence (ltx-2-community-license-agreement) and its text repeats a USD 10,000,000 annual-revenue threshold for 'Entities'. The candidates' LTX-Video facts (8n+1 frames, divisible-by-32 sizes, 0.9.5 Open RAIL-M, 0.9.6+ Open Weights Licence 0.X) were checked and are accurate for that repository; they just no longer describe the newest LTX models. Failure modes. Reading the old licence as covering LTX-2 weights. Limitations. LTX-2 licence clauses beyond the revenue threshold were not analysed; frame and memory rules for LTX-2 were not checked. Version and date. Fetched 2026-10-23. Curator qualifications: Verified the CogVideoX table entries and the Mochi statement. The LTX consumer-GPU figure is a fork claim, not comparable, as stated. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed. ```json { "citations": [ { "url": "https://github.com/zai-org/CogVideo/blob/7a1af7154511e0ce4e4be8d62faa8c5e5a3532d2/README.md", "note": "table; requirements" }, { "url": "https://github.com/Lightricks/LTX-Video/blob/4b2d053057623ddd4d0a1d3e9cd28890e9ef487f/README.md", "note": "table; requirements" }, { "url": "https://github.com/genmoai/mochi/blob/674ce8814ed07a7a0fd62ce5abd077f9ea8f41ab/README.md", "note": "table; requirements" }, { "url": "https://raw.githubusercontent.com/Lightricks/LTX-Video/main/README.md", "note": "correction source (record C3-B681-02): README banner 'New: LTX-2 is Now Available!'; model card front matter; commercial-entity clause" }, { "url": "https://huggingface.co/Lightricks/LTX-2/raw/main/README.md", "note": "correction source (record C3-B681-02): README banner 'New: LTX-2 is Now Available!'; model card front matter; commercial-entity clause" }, { "url": "https://raw.githubusercontent.com/Lightricks/LTX-2/main/LICENSE-2", "note": "correction source (record C3-B681-02): README banner 'New: LTX-2 is Now Available!'; model card front matter; commercial-entity clause" } ] } ``` Evidence claims: - [sourced_fact] CogVideoX has the most explicit table: SAT BF16 76GB (1.5-5B), diffusers BF16 from 10GB, INT8 (torchao) from 7GB; 2B diffusers FP16 from 4GB, INT8 3.6GB; 5B diffusers BF16 from 5GB, INT8 4.4GB; speed at 50 steps single A100 about 1000 s for a 5-second 1.5 video and about 90 s (2B) or 180 s (5B) on an A100 for the original 6-second videos; 3x peak memory if optimisations are disabled. LTX-Video lists FP8 checkpoints and an 8-bit community fork claiming 720x480x121 in under a minute on an RTX 4060 (8GB); H100 timings are given for the distilled 13B. Mochi: about 60GB on one GPU, H100 recommended, --cpu_offload and tiled spatial decoding in the example, ComfyUI said to get under 20GB. · locator: table; requirements · source: https://github.com/zai-org/CogVideo/blob/7a1af7154511e0ce4e4be8d62faa8c5e5a3532d2/README.md Rights: - documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources. Use this evidence: - Check source, model version, limitations and rights. 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