API Changelog | LTX Documentation

Async API expanded to all video generation endpoints (Beta)

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.

HDR Video Conversion (Beta)

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.

Auto Top-Up

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.

LTX-2.3

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.

What’s new

Sharper fine details — new latent space with an updated VAE delivers noticeably crisper output.
Cleaner audio — improved data filtering reduces background noise and artifacts.
Stronger image-to-video — more natural motion, fewer static clips, and better visual consistency.
Better prompt understanding — improved text connector architecture for closer adherence to complex prompts.
Last-frame interpolation — provide a first and last frame to the image-to-video endpoint, and the model generates the video in between.
Portrait video support — native 9:16 vertical video generation across all resolutions.
24/48 FPS — new frame rate options alongside the existing 25/50 FPS.

Extend Video Endpoint

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

Upload Endpoint

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

Camera Motion Effects

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.

Developer Console Public Launch

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

Audio-to-Video API

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

Retake (Video Editing) Endpoint

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