> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs-dev.ltx.io/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs-dev.ltx.io/_mcp/server.

## 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.