# Which inputs and settings does LTX 2.5 Fast support?

Reference inputs: Image. Maximum references: 2. Output options: 720p - 1080p - 2k - 4k. Aspect ratios: 16:9 - 9:16. Duration: 2 - 3 - 4 - 5 - 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 seconds.

Canonical URL: https://www.subclip.app/faq/model-detail-ltx-2.5-fast-inputs

Last modified: 2026-10-21

Reference inputs: Image. Maximum references: 2. Output options: 720p - 1080p - 2k - 4k. Aspect ratios: 16:9 - 9:16. Duration: 2 - 3 - 4 - 5 - 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 seconds.

## How to use LTX 2.5 Fast

1. Choose LTX 2.5 Fast and describe the shot or edit.

2. Add the references required by this model and set the available output options.

3. Generate, review the motion and refine the result in your timeline.

[LTX 2.5 Fast in Subclip](/ai-models/ltx-2.5-fast)

## Back to FAQ

- [Back to FAQ](https://www.subclip.app/faq)