API Changelog

• 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.

Camera motion support for image-to-video and text-to-video endpoints, giving direct control over camera movement in generated videos. Options: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, and focus_shift.

The developer console is now open to the public with self-service signup, automatic organization creation, and prepaid billing with credit top-up.

New audio-to-video endpoint for generating videos driven by audio input, with dedicated prompt enhancement.

New retake endpoint for editing specific sections of existing videos using text prompts.

Initial public API with image-to-video and text-to-video endpoints. Multiple model support, built-in prompt enhancement, concurrency-based quotas, and full API documentation.