Supported Models | LTX Documentation

The LTX API offers video generation powered by LTX-2.5 and LTX-2.3 — portrait and landscape video up to 4K, cinematic frame rates, and first-to-last frame control. Pass the model ID in the model field of your request.

LTX-2 (ltx-2-fast, ltx-2-pro) has been deprecated and will be removed on August 15, 2026. Migrate to LTX-2.3 (ltx-2-3-fast, ltx-2-3-pro).

See the LTX-2 Deprecation Notice.

LTX-2.5

Fast and Pro variants. Portrait and landscape video up to 4K on Fast, up to 1080p on Pro, at cinematic frame rates (24 fps, plus 48 fps on Fast). Stronger prompt adherence and finer detail in texture, faces, and typography, plus automatic duration — let the model choose the clip length from your prompt.

LTX-2.3

Portrait and landscape video up to 4K. Cinematic frame rates (24/48 fps), first-to-last frame control for image-to-video, and sharp detail with accurate prompt handling.

Endpoint compatibility

Not every endpoint supports every model.

Endpoint	ltx-2-5-fast	ltx-2-5-pro	ltx-2-3-fast	ltx-2-3-pro
text-to-video	✓	✓	✓	✓
image-to-video	✓	✓	✓	✓
audio-to-video	✓	✓	—	✓
retake	—	—	—	✓
extend	—	—	—	✓
reframe	—	—	—	✓

Supported resolutions, frame rates, and durations differ per model — see LTX-2.5 and LTX-2.3.

Pricing

For per-second pricing by model and resolution, see the Pricing page.