> 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.

## Automatic duration

* 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](/models/ltx-2-5#automatic-duration) and [Pricing](/pricing).