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LTX-2.5 Pro Text-to-Video
text-to-video
PRO

LTX 2.5 Pro Text-to-Video API by LTX

ltx/ltx-2.5-pro/text-to-video
Text-to-video

LTX-2.5 Pro text-to-video (Lightricks LTX-2 native API): generate a cinematic clip from a text prompt, up to 4K at 24/48 fps (6–10s, top-quality, with synchronized audio).

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LTX 2.5 Pro Text-to-Video is developed by a third-party provider. Atlas Cloud (operated by Atlas Cloud AI LLC) provides access to it and does not own it. All trademarks belong to their respective owners.

1. Introduction

LTX-2.5 Pro Text-to-Video is served through the native Lightricks LTX-2 API (api.ltx.io). This README covers a single API model identifier:

  • ltx/ltx-2.5-pro/text-to-video

LTX-2 is Lightricks' second-generation diffusion-transformer video model, generating video up to 4K at cinematic frame rates (24 and 48 fps). This is the LTX-2.5 Pro tier: it generates 6–10 second clips and supports synchronized audio generation. Requests are processed asynchronously (submit + poll) and every generation is delivered as a finished MP4 hosted on AtlasCloud storage.

2. Key Features

  • Text-to-Video: Generate a cinematic clip from a text prompt describing content, camera movement and atmosphere.
  • Native Audio-Video: Produces a matched soundtrack (ambience, effects, speech) aligned to the visuals; set generate_audio: false for a silent clip.
  • Up to 4K, 24/48 fps: Renders at 720p / 1080p / 1440p / 4K in landscape (16:9) or portrait (9:16).
  • Top-Quality Rendering: Prioritizes visual fidelity, motion coherence and prompt adherence, with 6–10s single-pass duration.
  • Camera Control: Optional camera_motion directive (dolly, jib, focus shift, static).

3. Support Matrix

ResolutionLandscapePortraitFPSDuration (s)
720p1280x720720x128024, 486, 8, 10
1080p1920x10801080x192024, 486, 8, 10
1440p2560x14401440x256024, 486, 8, 10
4K3840x21602160x384024, 486, 8, 10

duration: -1 (automatic) is available on LTX-2.5 tiers only. Audio generation is supported.

4. Parameters

The request body matches this model's schema exactly:

ParameterTypeRequiredDefaultNotes
promptstringYesA majestic eagle soaring through golden clouds at sunset, slow cinematic dolly-in, warm light.Scene description including desired content, camera movement and atmosphere.
durationintegerNo-1One of: -1, 6, 8, 10. Video length in seconds. Use -1 to let the model choose the duration automatically.
resolutionstringNo720pOne of: 720p, 1080p, 1440p, 4k. Output resolution tier. Combined with aspect_ratio to select the exact frame size (720p→1280x720, 1080p→1920x1080, 1440p→2560x1440, 4k→3840x2160; portrait 9:16 swaps width/height). 1440p and 4k support 6–10s durations only.
aspect_ratiostringNo16:9One of: 16:9, 9:16. Frame orientation: 16:9 landscape or 9:16 portrait.
fpsintegerNo24One of: 24, 48. Frames per second. 48 fps is available only for durations ≤10s; at 1440p and 4k all durations are ≤10s regardless of fps.
generate_audiobooleanNotrueWhether to generate AI audio (ambience, effects, speech) matching the scene.
camera_motionstringNoOne of: dolly_in, dolly_out, dolly_left, dolly_right, jib_up, jib_down, static, focus_shift. Optional camera movement directive applied to the shot.

5. Intended Use & Applications

  • Cinematic Shots & Trailers: Prompt-driven hero moments and promotional cuts.
  • Social & Vertical Content: Native 9:16 portrait output for short-form platforms.
  • Storyboards & Previz: Fast prompt-to-shot iteration with explicit camera direction.
  • Concept & Ideation: Explore looks and motion from text before committing to production.

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