LTX-2 Deprecation Notice | LTX Documentation

LTX-2 (ltx-2-fast, ltx-2-pro) has been deprecated and will be removed on August 15, 2026. Migrate to LTX-2.3 (ltx-2-3-fast, ltx-2-3-pro).

LTX-2 was deprecated on July 15, 2026. Requests that specify an LTX-2 model are now automatically served by LTX-2.3 and still billed at LTX-2 rates, so your integration keeps working during the transition with no price change. LTX-2.3 includes all of the functionality of LTX-2, along with improved quality, performance, and the latest capabilities.

On August 15, 2026, LTX-2 will be removed. After that date, LTX-2 requests are no longer supported and will return an error. Migrate to LTX-2.3 before then.

How to migrate

Update the model field in your requests to the LTX-2.3 equivalent:

Deprecated (LTX-2)	Replacement (LTX-2.3)
`ltx-2-fast`	`ltx-2-3-fast`
`ltx-2-pro`	`ltx-2-3-pro`

See LTX-2.3 and Pricing for replacement details.

LTX-2 support matrix

Resolutions, FPS values, and duration options supported by LTX-2 until it is removed.

Model	Resolution	FPS	Duration (seconds)
ltx-2-fast	1080p	25	6, 8, 10, 12, 14, 16, 18, 20
	1080p	50	6, 8, 10
	1440p	25, 50	6, 8, 10
	4K	25, 50	6, 8, 10
ltx-2-pro	1080p	25, 50	6, 8, 10
	1440p	25, 50	6, 8, 10
	4K	25, 50	6, 8, 10

Aspect ratio: 16:9 (landscape) only. LTX-2.3 adds 9:16 (portrait).

Resolution	API value
1080p	`1920x1080`
1440p	`2560x1440`
4K	`3840x2160`