LTX 2.3 Fast
Lightricks' fastest LTX 2.3 tier with synchronized audio. Open-weight cinematic concept iteration — describe a clip with audio cues, get a quick render with sound. Use for iteration before stepping up to LTX 2.3 Pro for final renders.
LTX 2.3 Fast has been retired on Upsampler and no longer accepts new generations. The alternatives below cover similar ground.
At a glance
- Status
- Retired
- Our rating
- Speed
- Fast
What LTX 2.3 Fast is best for
How LTX 2.3 Fast performs
Strengths
- Lightricks' fastest LTX 2.3
- good for iteration
- open-weight availability
Limitations
- less polished than LTX 2.3 Pro
- weaker than top-tier closed models
How to prompt LTX 2.3 Fast
Practical tips to get the most out of LTX 2.3 Fast.
- 01describe motion explicitly
- 02use for iteration before Pro for finals
Tips are tuned for LTX 2.3 Fast specifically.
Made with LTX 2.3 Fast
Prompt: A woman dancing in a garden full of animals. She is wearing a T-shirt with the word “Upsampler” on it.
Alternatives to LTX 2.3 Fast
Other models on Upsampler that cover similar ground.
LTX-2.3 Pro
Lightricks' flagship LTX 2.3 with synchronized audio. Higher-fidelity video generation in the open-weight LTX line, with cinematic camera handling and audio sync. Strong choice for teams that want premium video quality on infrastructure they control.
Wan 2.2 14B
Alibaba's flagship Wan 2.2 video model with strong stylization. Open-weight availability makes it useful for self-hosted pipelines and teams that want production-quality video generation without closed-API costs. Edged out by Veo, Sora, and Kling at the top tier but cost-competitive.
Seedance 1 Pro
ByteDance's Seedance 1.0 — fast, cost-efficient video generation with strong motion physics and detail. The original Seedance flagship, now succeeded by Seedance 1.5 Pro and 2 Fast for top-tier work. Still a practical pick when 1.5 Pro and 2 are overkill for the brief.
Frequently asked questions
What is LTX 2.3 Fast?
Lightricks' fastest LTX 2.3 tier with synchronized audio. Open-weight cinematic concept iteration — describe a clip with audio cues, get a quick render with sound. Use for iteration before stepping up to LTX 2.3 Pro for final renders.
Is LTX 2.3 Fast still available on Upsampler?
LTX 2.3 Fast has been retired on Upsampler and no longer accepts new generations. Existing creations keep rendering, and the alternatives listed below cover similar ground.
What are alternatives to LTX 2.3 Fast?
Common alternatives: LTX-2.3 Pro, Wan 2.2 14B, Seedance 1 Pro.
Can I try LTX 2.3 Fast for free?
You can try a free, no-signup version of our ai video generator. Note that the free version may use a different, lighter model rather than LTX 2.3 Fast itself.