Run LTX 2.3 Fast Online and Pay Only For What You Generate
The fast LTX 2.3 tier generating clips up to 20 seconds at 1080p. The longest-form model in the catalog. Run LTX 2.3 Fast in your browser with no install and no waitlist — up to 4K, clips to 20 seconds, audio included, from 43 credits a generation.
LTX 2.3 Fast Specifications
Pulled directly from the generation engine, so what you read here is what the model actually does.
What LTX 2.3 Fast Does Well
Native 4K output — no upscaling pass required
Single takes up to 20 seconds, longer than most models manage
Generates synchronised audio with the video
Pair it with the camera-motion preset library for shot-accurate movement
Exact credit cost shown before you generate — failed runs refund automatically
Who Builds LTX 2.3 Fast
Lightricks builds LTX as an open model with native 4K and synchronised audio. It delivers the best quality-per-credit in the catalogue and the longest single clips.
Best suited to
As the fast tier, LTX 2.3 Fast is a strong pick for storyboarding, prompt iteration and volume social content where turnaround matters more than peak fidelity.
LTX 2.3 Fast Pricing
Credits for a 6-second generation. The exact cost appears on the Generate button before you spend anything, and a failed generation refunds automatically.
Unused credits expire at plan renewal/expiration. No throttled "unlimited" tier.
Clear credit pricing
Every generation has a transparent upfront cost. Unused credits expire at plan renewal.
Failed runs refund instantly
If a generation fails, the credits return to your balance automatically — no support ticket.
Price shown up front
The exact credit cost is printed on the Generate button before you commit to anything.
LTX 2.3 Fast — Frequently Asked Questions
How much does LTX 2.3 Fast cost?
It depends on resolution. A 6-second clip costs 43 credits at 1080p and 171 credits at 4K. Visualix AI prints the exact cost on the Generate button before you commit, and refunds automatically if a run fails.
How long can a LTX 2.3 Fast video be?
LTX 2.3 Fast handles up to 20 seconds in a single pass — selectable lengths are 6s, 8s, 10s, 12s, 16s and 20s. For longer pieces, generate several shots and cut them together in the editor.
Does LTX 2.3 Fast generate sound?
Yes. LTX 2.3 Fast produces synchronised audio alongside the picture — ambience, effects and, where the prompt calls for it, speech. No separate sound pass is needed.
Can I animate my own image with LTX 2.3 Fast?
Not directly — this entry is text-to-video only. Visualix AI carries image-to-video models including Kling 3.0, Seedance 2.0 and Runway Gen-4.5 if you want to animate an existing still.
What resolution does LTX 2.3 Fast output?
1080p, 2K and 4K. 4K is generated natively rather than upscaled, so fine detail is genuinely resolved rather than interpolated.
Can LTX 2.3 Fast make vertical video for TikTok and Reels?
Yes — LTX 2.3 Fast supports 16:9 and 9:16, so you can generate natively vertical 9:16 footage rather than cropping a landscape render.
Do my credits expire?
No. Unused credits expire at plan renewal/expiration. There is no throttled "unlimited" tier and no queue that slows down the more you use it — you see the price of each generation and pay that.
Compare With Other Models
Lightricks' flagship open model with native 4K and synchronized audio. Outstanding quality per credit.
Lightricks' ultra-fast LTX 2.5 video engine on Replicate. Generates up to 20-second cinematic sequences with synchronized audio up to 4K resolution.
Lightricks' premier LTX 2.5 Pro video engine on fal.ai. High-fidelity cinematic 4K output, complex spatial motion, and synchronized native audio.
The most affordable Seedance 2.0 tier on Replicate. Fast drafts and prompt iteration with synchronized audio.
Generate with LTX 2.3 Fast now
No install, no waitlist, no subscription lock-in. Start with free credits and pay only for what you generate.