API Changelog

• Reframe now takes an optional placement, to choose where the source video lands on the output frame. Pass an anchor such as { "anchor": "top" } to fit and align it, or a rectangle such as { "x": 0, "y": 0.35, "width": 1 } to set its position and size exactly.
• Requests without placement are unchanged: the source is centered at the largest size that fits.

• After October 26, 2026 at 11:59 PM UTC, requests to /v1/text-to-video, /v1/image-to-video, /v1/audio-to-video, /v1/retake, and /v1/extend will no longer work.
• Migrate to the corresponding V2 endpoints before then. The media upload endpoint remains /v1/upload.

See Migrate from V1 to V2.

• Reframe now picks its own model, so you no longer need to send model. If you still send it, it’s ignored. Existing requests keep working.

Submit a reframe job.

• V1 video generation endpoints with V2 replacements are being deprecated: /v1/text-to-video, /v1/image-to-video, /v1/audio-to-video, /v1/retake, and /v1/extend.
• Move to the corresponding V2 endpoints to submit background jobs, poll for completion, and download the result. Your authentication, generation request parameters, and pricing remain unchanged.
• The media upload endpoint remains /v1/upload.

• ltx-2-5-pro now generates 1440p and 4K in 16:9 and 9:16, and accepts 48 fps, on text-to-video, image-to-video, and audio-to-video.
• 1440p is billed at $0.25 per second and 4K at$0.39 per second. See LTX-2.5 and Pricing.

• Audio-to-video now supports fps (default 24), last_frame_uri (requires image_uri), and camera_motion — matching text-to-video and image-to-video. Available on v2/audio-to-video and v1/audio-to-video.

• Audio-to-video now supports the same resolution tiers as text-to-video and image-to-video: ltx-2-5-fast up to 4K, ltx-2-5-pro up to 1080p, and ltx-2-3-pro up to 4K.
• Maximum input audio length depends on model and resolution tier — for example, ltx-2-3-pro accepts up to 20 seconds at 720p/1080p and up to 10 seconds at 1440p/4K. See the API reference for the full table.
• New resolution tiers are billed at the rates shown on Pricing.

• As announced in the July 2 LTX-2 deprecation notice, ltx-2-fast and ltx-2-pro are no longer available. Requests that specify these models return an error.
• Migrate to LTX-2.3 (ltx-2-3-fast, ltx-2-3-pro) or LTX-2.5 (ltx-2-5-fast, ltx-2-5-pro).

See Supported Models and Pricing.

• New LTX-2.5 models for Text-to-Video, Image-to-Video, and Audio-to-Video, in portrait and landscape: ltx-2-5-fast up to 4K, and ltx-2-5-pro at 720p and 1080p. Audio-to-Video generates at 1080p on both.
• Both models accept camera motion, last_frame_uri on Image-to-Video, and "duration": null for automatic duration.

See LTX-2.5 and Pricing.

• Text-to-Video and Image-to-Video now accept "duration": null on ltx-2-5-fast, letting the model choose the clip length from your prompt.

See Automatic duration and Pricing.

• Text-to-Video and Image-to-Video now support a 720p output tier on LTX 2.3 (1280x720 landscape and 720x1280 portrait).

See Pricing and the supported models.

• The LTX API is now available at https://api.ltx.io — docs and code samples use it going forward.
• Existing integrations on https://api.ltx.video keep working unchanged, so no migration is required.

• New /v2/video-to-video-reframe endpoint (async) to reframe a video to a new resolution, filling in the missing areas with generated content (720p and 1080p; 1:1, 4:5, 5:4, 9:16, 16:9).

Submit a reframe job.

• LTX-2 (ltx-2-fast, ltx-2-pro) will be deprecated on July 15, 2026. From that date, LTX-2 requests are automatically served by LTX-2.3 with no change to LTX-2 pricing. On August 15, 2026, LTX-2 will be removed and those requests return an error.
• Migrate to LTX-2.3 (ltx-2-3-fast, ltx-2-3-pro) before August 15, 2026.

• New async endpoints: /v2/text-to-video, /v2/image-to-video, /v2/audio-to-video, /v2/retake, /v2/extend. Submit a job, poll for status, download from result.video_url when complete.

See Async Jobs for more details.

• New /v2/video-to-video-hdr endpoint for converting SDR videos to HDR. Returns per-frame EXR images suitable for professional color grading and HDR rendering pipelines.
• Introducing Async API support: submit a job, poll for status, download when complete. Currently only the HDR endpoint is supported; more endpoints will follow soon. See Async Jobs.

Submit an HDR conversion job.

You can now configure auto top-up to automatically purchase credits when your balance falls below a threshold. Set a threshold and top-up amount, and the system handles the rest — no more manual credit purchases to keep your API running.

Learn more about auto top-up.

Introducing LTX-2.3 — a major leap in quality and speed for AI video generation. LTX-2.3 is now the default model across the API, available in two variants:

• LTX-2.3 Pro (ltx-2-3-pro) — best-in-class quality, supports all endpoints including audio-to-video, retake, and extend.
• LTX-2.3 Fast (ltx-2-3-fast) — blazing fast generation, supports text-to-video and image-to-video.

New v1/extend endpoint for extending video duration by generating additional frames at the beginning or end.

New v1/upload endpoint for uploading assets via signed URLs.