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# LTX 2.5 Fast — Try Online, 4K & vs Pro

> Try LTX 2.5 Fast online in Clip Studio Video Lab. Quicker LTX 2.5 clips at 720p–4K, 6–10s, first/last frames, and 24–50 fps.

Canonical page: https://clipstudio.ai/ai-video-models/ltx-2-5-fast

## Answer

LTX 2.5 Fast is the accelerated LTX 2.5 path in Video Lab. Generate from text, animate a source frame, or define both ends of a shot at 720p, 1080p, 1440p, or 4K with selectable frame rates and optional audio. Durations are 6, 8, or 10 seconds so high-resolution and high-fps jobs stay valid.

## Best for

Faster LTX drafts, 4K LTX 2.5 delivery, and shots that need 24, 25, 48, or 50 fps.

## Specs

- Duration: 6, 8, or 10 seconds
- Resolution: 720p, 1080p, 1440p, or 4K
- Aspect ratio: 16:9 or 9:16
- Audio: Optional generated audio
- Input support: Text prompt, Animate image, First → last

## Strengths

- 720p through 4K
- Animate and first/last frames
- 24–50 fps including 48 fps


## Considerations

- Uses fixed 6, 8, or 10 second durations
- Supports landscape and vertical rather than every social ratio


## Prompt tip

Choose frame rate for the intended motion feel first, then describe camera velocity and subject movement in language that matches it.

## Prompts that work

- Choose 48 fps, then a splash insert at 6 seconds and 4K.
- 24 fps crane over a 1080p tabletop; Fast when you want the quicker 2.5 SKU.
- First and last frames of a city crosswalk; 8 seconds, optional traffic.
- 9:16 app demo at 1440p when 2.5 Pro’s 1080p ceiling is not enough.


## Official documentation

- [LTX 2.5 Fast text-to-video documentation](https://fal.ai/models/lightricks/ltx-2.5/text-to-video/fast)
- [LTX 2.5 Fast image-to-video documentation](https://fal.ai/models/lightricks/ltx-2.5/image-to-video/fast)

## FAQs

### What is LTX 2.5 Fast best for?

LTX 2.5 Fast is the quicker LTX 2.5 SKU for 720p through 4K clips with first/last frames and selectable frame rates.

### Can I try LTX 2.5 Fast online?

Yes. Open LTX 2.5 Fast in Clip Studio Video Lab to generate in the browser. Generate 6, 8, or 10 second clips at 720p, 1080p, 1440p, or 4K with first/last frames, optional audio, and 24, 25, 48, or 50 fps. Sign in to generate; this model page is public.

### Can LTX 2.5 Fast use first and last frames?

Yes. Video Lab supports a single source image or both first and last frames at 720p through 4K.

### How is LTX 2.5 Fast different from LTX 2.5 Pro?

2.5 Pro is 720p or 1080p with 24, 25, or 50 fps. Fast adds 1440p, 4K, and 48 fps at a lower per-second rate. Both use 6, 8, or 10 second shots.

### Which frame rates are supported?

The supported choices are 24, 25, 48, and 50 frames per second.

### How is LTX 2.5 Fast priced?

LTX 2.5 Fast uses your monthly generation allowance. Each Clip Studio plan includes a monthly generation allowance. Duration, resolution, audio, and other settings use that allowance. Plan details live on the pricing page. This page does not list a per-model dollar price.


## Make a story using this model's shots

Paste a story or script. Clip Studio plans cinematic shots, narrates them, and renders a multi-shot film. [Make a story using this model's shots](https://clipstudio.ai/features/story-video).

## Related

- [Story to Video](https://clipstudio.ai/features/story-video.md)
- [Video Lab](https://clipstudio.ai/video-lab.md)
- [Topic Shorts](https://clipstudio.ai/topic-shorts.md)
- [All models](https://clipstudio.ai/ai-video-models.md)
- [LTX 2.5 Fast vs LTX 2.5 Pro](https://clipstudio.ai/ai-video-models/ltx-2-5-fast-vs-ltx-2-5.md)