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Video generationStable
LightricksLTX-2.5 Fast
LTX's speed-optimized video model for text, image, or audio input, native sound, automatic duration, and output up to 4K.
Plain-English overview
What LTX-2.5 Fast actually is
LTX-2.5 Fast is the broader-resolution sibling of 2.5 Pro. It supports landscape and portrait creation from prompts, starting images, or audio, can generate synchronized sound or silent clips, and can choose a duration automatically from the requested scene.
Fast reaches 4K but higher resolution increases both price and practical generation load. Duration and frame-rate choices also narrow at the upper tiers, so teams should design a few explicit production presets instead of exposing every possible combination to users.
Good fit for
- Fast video experiments with native audio
- Portrait or landscape output up to 4K
- Prompt-driven multi-shot clips with automatic duration
Category comparison
The facts that matter for video models
These are provider-published specifications, not Cody benchmark scores. Follow the linked sources for current limits and endpoint-specific exceptions.
- Generation price
- $0.09/s 720p to $0.30/s 4KCurrent list price per generated second or the provider's closest billing unit.
- Clip duration
- 6–20 seconds depending on resolution and frame rateDocumented duration choices or maximum clip length.
- Maximum output
- 4KHighest provider-documented output resolution, with relevant constraints.
- Native audio
- Yes; can also generate silent videoWhether the endpoint generates synchronized audio with video.
- Input modes
- Text, image, or audio; optional last frame and camera motionSupported text, image, video, reference, or motion inputs.
- Generation time
- Fast tier; exact time not publishedOnly shown when a provider publishes a range; not a Cody benchmark.
Pricing & comparisons
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Example: 8-second, 720p clips with audio. Models that do not support these settings will not receive an estimate.
LTX-2.5 Fast
Lightricks
Estimated total (USD)
For the usage above · USD · API pricing, not a subscription
How this estimate works
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
API and provider access
Where to get LTX-2.5 Fast
Availability
Regions and access stage
Generally available through the LTX API for text-, image-, and audio-to-video.
The public model guide does not enumerate a processing-country list; account and enterprise terms determine region and capacity.
Check live availabilityData and training
The route matters.
The reviewed public LTX model and pricing guides do not state one complete endpoint-specific retention or training-use commitment. Verify current account and enterprise terms for sensitive media.
This is a concise reading of the cited provider material, not legal advice. A third-party gateway can have different storage, routing, training, and residency terms from the model maker's direct API.
Read the provider policyFrequently asked questions
LTX-2.5 Fast FAQ
What is LTX-2.5 Fast?
LTX's speed-optimized video model for text, image, or audio input, native sound, automatic duration, and output up to 4K. LTX-2.5 Fast is the broader-resolution sibling of 2.5 Pro. It supports landscape and portrait creation from prompts, starting images, or audio, can generate synchronized sound or silent clips, and can choose a duration automatically from the requested scene.
When was LTX-2.5 Fast released?
LTX-2.5 Fast was released on August 11, 2026 according to the cited provider materials.
Where can I access LTX-2.5 Fast?
Generally available through the LTX API for text-, image-, and audio-to-video. The access routes listed in this guide are LTX.
How much does LTX-2.5 Fast cost?
$0.09/s 720p · $0.13/s 1080p · $0.30/s 4K. These are LTX text-, image-, and audio-to-video rates by output resolution; 1440p is $0.19 per second.
Where is LTX-2.5 Fast available?
Generally available through the LTX API for text-, image-, and audio-to-video. The public model guide does not enumerate a processing-country list; account and enterprise terms determine region and capacity.
Is my LTX-2.5 Fast API data used for training?
The reviewed public LTX model and pricing guides do not state one complete endpoint-specific retention or training-use commitment. Verify current account and enterprise terms for sensitive media. The policy belongs to the provider route and account terms, so verify it again before production use.
Related comparisons
Head-to-head comparisons
LTX-2.5 Fast vs Sora 2
OpenAI's legacy synced-audio video model for short text- or image-guided clips—still documented, but approaching a permanent API shutdown.
Open full comparisonLTX-2.5 Fast vs Veo 3.1
Google's preview video model for text-, image-, and video-guided generation with native audio and output options up to 4K.
Open full comparisonLTX-2.5 Fast vs Veo 3.1 Fast
Google's lower-cost Veo 3.1 variant for quickly creating short video clips with native audio and output options up to 4K.
Open full comparisonLTX-2.5 Fast vs Runway Gen-4.5
Runway's flagship developer video model for text- and image-guided clips, with professional formats and a predictable credit-per-second base rate.
Open full comparisonLTX-2.5 Fast vs Kling Video 3.0 Pro
Kuaishou's Pro video model delivered through fal for multi-shot text/image generation, optional native audio, references, and clips up to 15 seconds.
Open full comparisonLTX-2.5 Fast vs Kling Video 2.5 Turbo Pro
A cost-conscious Kling model on fal for fluid five- or ten-second clips generated from text or a starting image.
Open full comparisonLTX-2.5 Fast vs Grok Imagine Video 1.5
SpaceXAI's current video model for turning text, images, or references into short clips with optional generated speech and sound.
Open full comparisonLTX-2.5 Fast vs Seedance 2.5
ByteDance's current audiovisual model for coherent clips up to 30 seconds, with native sound, long-form storytelling, rich references, and targeted editing.
Open full comparisonLTX-2.5 Fast vs HappyHorse 1.1
Alibaba's unified video family for creating short clips with sound from text, a starting image, or a reference video.
Open full comparisonLTX-2.5 Fast vs LTX-2.5 Pro
Lightricks' quality-focused video model for making 720p or 1080p clips from text, images, or audio with native sound.
Open full comparisonLTX-2.5 Fast vs LTX-2.3 Pro
LTX's mature full-workflow video model for generation plus Retake, Extend, Reframe, native audio, and first-to-last-frame control.
Open full comparison
