LTX

LTX Video

LTX 2.5 supports text-to-video and image-to-video generation in landscape or portrait orientation. A first frame can establish the opening composition, and an optional last frame can guide the ending. Choose Fast for lower-cost iteration and resolutions up to 4K, or Pro for high-fidelity 720p and 1080p output with synchronized dialogue, sound effects, and music.

How to use this model

  1. 1

    Choose Fast for rapid lower-cost iterations or Pro when final-detail fidelity matters most.

  2. 2

    Write one coherent prompt describing the subject, action, camera movement, lighting, and intended sound.

  3. 3

    Upload a first frame to preserve the opening composition, and add a last frame only when both endpoints need guidance.

  4. 4

    Select duration, resolution, orientation, frame rate, and audio before starting generation.

2.5 FastAvailable

LTX 2.5 Fast

LTX 2.5 Fast is designed for rapid video iteration from a text prompt or an optional first frame. Add a last frame when the ending also needs visual guidance, then choose landscape or portrait output, a duration from 2 to 20 seconds, resolution from 720p through 4K, frame rate, and synchronized audio.

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Properties

  • Durations from 2 to 20 seconds with resolutions from 720p through 4K.
  • Text, first-frame, and first/last-frame workflows with optional synchronized audio.

Best for

  • Rapid ideation, storyboarding, and high-volume video generation

Tips

  • Describe subject action, camera movement, lighting, and audio in one coherent scene prompt.

How to use this model

  1. 1

    Write the scene prompt and optionally upload a first frame.

  2. 2

    Add a last frame only together with a first frame when the ending must be fixed.

  3. 3

    Choose duration, resolution, orientation, frame rate, and synchronized audio.

  4. 4

    For clips longer than 10 seconds, use 720p or 1080p at 24 or 25 FPS.

Parameters

Prompt

prompt
Required

Describe the scene, action, camera movement, lighting, and desired audio.

First Frame

image
Optional

Optional image used as the first frame of the generated video.

Last Frame

last_frame_image
Optional

Optional final frame. A first-frame image is required when this is provided.

Duration

duration
Optional
Default: 6

  • 2 seconds

  • 3 seconds

  • 4 seconds

  • 5 seconds

  • 6 seconds

  • 8 seconds

  • 10 seconds

  • 12 seconds

  • 14 seconds

  • 16 seconds

  • 18 seconds

  • 20 seconds

Resolution

resolution
Optional
Default: 1080p

  • 720p

  • 1080p

  • 2K

  • 4K

Aspect Ratio

aspect_ratio
Optional
Default: 16:9

  • 16:9

  • 9:16

Frame Rate

fps
Optional
Default: 24

  • 24 FPS

  • 25 FPS

  • 48 FPS

  • 50 FPS

Generate Audio

generate_audio
Optional

Generate synchronized dialogue, sound effects, and music with the video.

Default: true
2.5 ProAvailable

LTX 2.5 Pro

LTX 2.5 Pro prioritizes final-detail fidelity for text-to-video and image-to-video generation. Use an optional first frame to establish the opening composition and a last frame to guide the ending, then select a 6, 8, or 10 second duration, 720p or 1080p output, landscape or portrait orientation, frame rate, and synchronized audio.

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Properties

  • High-fidelity 720p or 1080p output for 6, 8, or 10 second clips.
  • Text, first-frame, and first/last-frame workflows with optional synchronized audio.

Best for

  • High-fidelity text-to-video and image-to-video generation

Tips

  • Describe subject action, camera movement, lighting, and audio in one coherent scene prompt.

How to use this model

  1. 1

    Write a detailed scene prompt covering action, camera, lighting, and sound.

  2. 2

    Upload a first frame when the opening composition or subject appearance must be preserved.

  3. 3

    Add a last frame only together with a first frame when the ending also needs guidance.

  4. 4

    Choose duration, 720p or 1080p output, orientation, frame rate, and synchronized audio.

Parameters

Prompt

prompt
Required

Describe the scene, action, camera movement, lighting, and desired audio.

First Frame

image
Optional

Optional image used as the first frame of the generated video.

Last Frame

last_frame_image
Optional

Optional final frame. A first-frame image is required when this is provided.

Duration

duration
Optional
Default: 6

  • 6 seconds

  • 8 seconds

  • 10 seconds

Resolution

resolution
Optional
Default: 1080p

  • 720p

  • 1080p

Aspect Ratio

aspect_ratio
Optional
Default: 16:9

  • 16:9

  • 9:16

Frame Rate

fps
Optional
Default: 24

  • 24 FPS

  • 25 FPS

  • 50 FPS

Generate Audio

generate_audio
Optional

Generate synchronized dialogue, sound effects, and music with the video.

Default: true