Speed testsDetails
Designed for rapid iteration and volume. Use it to discover hooks and pacing before polishing.
- Generate many variants quickly.
- Keep prompts short and direct.
- Test different openings back-to-back.
- Promote winners to Pro.
Lightricks model
LTX-2 Fast
Fast 6–20s clips with synced audio — up to 4K and 25–50 fps for rapid iteration.
Use it for hooks, pacing, and mood exploration, then regenerate winners in the premium tier.
Text→VideoImage→Video4K20s16:9Audio
Pay-as-you-go · Price shown before you generate
- Price$0.05/s
- Duration8s
- Format16:9
Best use cases
Rapid concept testingAd drafts & variant testingSocial clips & quick iterationsPre-viz & story beatsMood pieces & cinematic B-rollRough-cut sequences & loops
Why LTX-2 Fast inside MaxVideoAI
- Built for iteration speed (Make lots of variations fast without overthinking the first pass.)
- More room per clip (Better for pacing, build-up, and “mini-scene” beats than ultra-short engines.)
- Sound-ready drafts (Great for temp dialogue/ambience/SFX timing (or mute and finish audio in post).)
- Easy upgrade path (Keep the same prompt structure and rerun the keepers in LTX-2 Pro for polish.)
Real Specs – LTX-2 Fast in MaxVideoAI
The limits that shape your renders.
Price / second1080p $0.05/s1440p $0.10/s4k $0.21/s
Text-to-VideoSupported
Image-to-VideoSupported
Reference image / style referenceSupported
Max resolution4K
Max duration20s
Aspect ratios16:9
FPS options25 fps / 50 fps
Output formatMP4
Audio outputSupported
Native audio generationSupported
Lip syncSupported
Camera / motion controlsBasic
WatermarkNo (MaxVideoAI)
Release dateOct 2025
Draft workflowDetails
The prompt format carries over to LTX-2 Pro, so upgrades are simple. Treat Fast as your draft layer.
- Reuse shot language for finals.
- Swap in stronger references later.
- Great for social drafts and loops.
- Save prompt templates.
LTX-2 Fast examples
Recent LTX-2 Fast renders with audio on/off for social clips and quick iterations.
LTX Video 2.0 Fast · 8s
Recreate this shot →
LTX Video 2.0 Fast · 8s
Recreate this shot →
LTX Video 2.0 Fast · 10s
Recreate this shot →
LTX Video 2.0 Fast · 8s
Recreate this shot →
LTX Video 2.0 Fast · 10s
Recreate this shot →
LTX Video 2.0 Fast · 8s
Recreate this shot →How to Write a Great LTX 2 Fast Prompt
LTXLTX-2 Fast prefers short prompts with one clear action and a single camera move.
Tip: duration + fps are set in the UI - your prompt controls subject, action, camera, lighting, style, and optional sound cues.
Quick prompt (fast iteration)
Use 1–2 sentences when you want variations.
Quick = variations. Use for fast iteration.
Template (copy/paste)
[Subject + action] in [setting], [camera move], [lighting/style], [optional sound cue]. Negative: [text, logos, extra people, blur]
Example
Handheld smartphone UGC clip of a woman unboxing a new skincare bottle at a kitchen table. She peels the seal, smiles, and turns the bottle toward camera. Soft window daylight, natural colors, subtle room tone + packaging crinkle.
Demo prompt – fast social clip
8 second 16:9 cinematic shot at a busy city crosswalk at golden hour. The camera starts behind a young woman with a backpack as she waits at the curb, then moves into a smooth handheld tracking shot as she steps onto the crosswalk and walks toward the opposite sidewalk. Warm sunlight hits the side of her face, cars roll past in the background, and soft lens flares appear on the edges of the frame. People cross in both directions but the camera keeps her framed clearly in the center. Audio: soft city ambience (cars, footsteps, distant voices) plus a light upbeat music bed, no dialogue and no text on screen. 1080p or 4K, clean commercial look, realistic motion, no slow motion.
View render →Tips & limitations
LTX-2 Fast is most reliable when you treat it like a draft pass: simple shots, quick variations, then polish the winner.
What works best
- Draft-first workflow: generate a few variants, pick a winner, then rerun in Pro for polish.
- One clear action + one camera move beats long “wish-list” prompts.
- Audio works best with 1–2 clear cues (ambience + one key sound). Keep dialogue short.
Common problems → fast fixes
- Feels random / inconsistent → remove extra beats; rerun 2–3 tight variations.
- Motion looks weird → slow the action and keep the camera move simple; reduce background clutter.
- Subject drifts off-brand → start from a reference image; keep wardrobe, lighting, and palette consistent.
- Text looks wrong → avoid readable signage, tiny UI, labels, and on-screen text.
- Dialogue drifts → keep lines short; avoid long monologues.
Hard limits to keep in mind
- 12–20s runs are locked to 1080p / 25 fps in this routing.
- 16:9 only.
- Image→Video uses one reference image (no multi-image control).
LTX-2 Fast vs LTX-2 Pro
View LTX-2 Pro details →Use LTX-2 Fast when you want:
- High-volume drafts and iteration speed
- Quick concept testing and pacing checks
- Rough cuts before finals
Use LTX-2 Pro when you need:
- Polished client-ready deliverables
- Higher resolution and smoother motion
- Audio-visual sync for finals
Compare LTX-2 Fast vs other AI video models
Not sure if LTX-2 Fast is the best fit for your shot? These side-by-side comparisons break down the tradeoffs — price per second, resolution, audio, speed, and motion style — so you can pick the right engine fast.
Each page includes real outputs and practical best-use cases.
ltx
LTX-2 Fast vs LTX 2.3 Fast
Stay in a fast workflow but switch to the current LTX 2.3 Fast routing for newer text-to-video and image-to-video generation.
Compare LTX-2 Fast vs LTX 2.3 Fast →ltx
LTX-2 Fast vs LTX 2.3 Pro
Step up to LTX 2.3 Pro when you need audio-to-video, extend, retake, and the broader current-generation LTX workflow set.
Compare LTX-2 Fast vs LTX 2.3 Pro →Safety & people / likeness
- No sexual content, and absolutely nothing involving minors.
- No hateful, harassing, or violent/graphic content.
- Don’t impersonate real people or public figures; use consent for any likeness/voice.
- Don’t include private personal data (faces of non-consenting people, addresses, phone numbers, documents).
- Keep outputs brand-safe; if you use dialogue, keep it clean and short.
FAQ
How long can LTX-2 Fast run?
6–20 seconds. Durations above 10 seconds must run at 1080p and 25 fps per Fal constraints.
Does LTX-2 Fast include audio?
Yes, native audio is on by default. You can toggle it off for silent exports.
Which aspect ratios are supported?
16:9 only in the current Fast routing. Use Wan or Pika for flexible ratios.