Video modelOpen weights
LTX-2.5
Lightricks
- Released
- August 11, 2026
- Data date
- October 3, 2026
New in LTX-2.5 are open weights for video, audio, and world simulation. Lightricks describes a 22-billion-parameter diffusion core and a Gemma4-12B text encoder; video and audio are generated in sync across several local execution modes.
The API groups text-to-video, image-to-video, and audio-to-video under ltx-2-5-fast and ltx-2-5-pro. Fast reaches 4K, while Pro offers 720p and 1080p. Both are serving modes of one family.
Specifications and access
| Specification | Value and source |
|---|---|
| Model class | Video, audio, and world simulation modelSource |
| API modes | ltx-2-5-fast up to 4K and ltx-2-5-pro at 720p or 1080pSource |
| Modalities | Text-to-video, image-to-video, and audio-to-video with synchronized audioSource |
| Audio | Audio-to-video generates 1080p on both API modesSource |
| Weights | Open weights for local execution and fine-tuningSource |
| License | LTX-2.x Community License, with a separate agreement for larger companiesSource |
Sources and data date
Every statement links to its underlying documentation or leaderboard.
| Type | Evidence and data date |
|---|---|
| Research status | Research date October 4, 2026. 2 source URLs checked. This documents the inspected sources, not an exhaustive inventory of every publication. |
| Not found in the inspected sources | family-level-benchmark Original wording AA reports Fast at 945 Elo and Pro at 943 Elo in separate audio-enabled text-to-video cohorts. Neither result is transferred to the family profile. |
| Additional source | LTX-2.5 API changelog (retrieved October 3, 2026) · LTX-2.5 API changelog · Editorial description reviewed October 3, 2026 |
| Additional source | LTX-2.5 model card (retrieved October 3, 2026) · LTX-2.5 model card · Editorial description reviewed October 3, 2026 |