Provider Ltx

LTX

Mode: video · Models: 5

Vendor: Lightricks LTX · Official API docs: docs.ltx.video

LTX 2.3 (by Lightricks) is a video model with synchronized native audio, first-to-last frame image control, and resolutions up to 4K. The Pro flagship handles text-to-video, image-to-video, audio-to-video, retake, and extend; the Fast variant trades fidelity for speed and longer clips.

Models

id	Name	Input type
ltx-v2.3-pro	LTX 2.3 Pro	t2v
ltx-v2.3-fast	LTX 2.3 Fast	t2v
ltx-2.3-a2v	LTX 2.3 Audio-to-Video	a2v
ltx-v2.3-extend	LTX 2.3 Extend	v2v
ltx-v2.3-retake	LTX 2.3 Retake	v2v

CLI

# text-to-video with native audio
gen-ai generate -m ltx-v2.3-pro \
  -p "aerial shot over a misty forest at dawn, slow push-in, ambient birdsong" \
  --ar 16:9 -r 1080p -d 8 --audio-gen

# image-to-video: animate a start frame
gen-ai generate -m ltx-v2.3-pro -p "the camera drifts forward as fog rolls in" -i ./still.jpg

# audio-driven generation
gen-ai generate -m ltx-2.3-a2v -p "a singer performing on a neon stage" -a ./vocals.mp3

# extend an existing clip
gen-ai generate -m ltx-v2.3-extend -p "the scene continues into night" --video ./clip.mp4

MCP

{ "name": "picsart_generate",
  "arguments": {
    "model": "ltx-v2.3-pro",
    "prompt": "aerial shot over a misty forest at dawn, slow push-in",
    "aspectRatio": "16:9",
    "resolution": "1080p",
    "duration": 8,
    "generateAudio": true
  } }

Parameters — ltx-v2.3-pro

Param	CLI flag	Type	Values
prompt	-p	text	required
duration	-d	enum	6 · 8 · 10 (seconds, default 6)
resolution	-r	enum	1080p · 1440p · 2160p (default 1080p)
aspectRatio	--ar	enum	16:9 · 9:16 (default 16:9)
generateAudio	--audio-gen	boolean	native audio track (default true)
imageUrls	-i	file	start image (image-to-video)

Source: gen-ai models info ltx-v2.3-pro --json. The Fast variant shares this surface (plus longer durations at 1080p); A2V/extend/retake are Pro-only and take audio/video inputs.

Pricing

gen-ai pricing ltx-v2.3-pro -d 8 -r 1080p

Cost scales with duration, resolution, and audio.