Duration & Output
- Durations: 6, 8, 10, 12, 14, 16, 18, 20 seconds
- 12–20s: constrained to 1080p at 25 fps
- Frame rate options: 25 or 50 fps
- Best balance at 6–10s for full 4K/50 fps; use 12–20s when you’re fine with 1080p/25
LTX-2 Fast – AI Video with Native Audio
Fast 20-second AI video with native audio. Perfect for tests, social clips, and quick iterations.
1080p/1440p/4K6–20sAudio on/off25/50 fps
Create 6–20 second clips with native audio, 1080p–4K and 25/50 fps in one card. LTX-2 Fast is the “instant” tier of the LTX-2 family: perfect for rapid social cuts, drafts, storyboards and mood pieces when you want 4K quality without waiting.
Above 10 seconds we automatically keep runs at 1080p/25 fps to match the Fal routing and keep turnarounds reliable.
Audio on8s
LTX-2 Fast – AI Video with Native Audio
18–20 second 16:9 continuous shot inside a bright startup office during the day. The camera starts in a wide shot at the…
View render →Why LTX-2 Fast inside MaxVideoAI
- 6–20s renders with audio on/off in a single card
- 1080p, 1440p or 4K with 25/50 fps for crisp motion
- Text → Video and Image → Video using the same prompt lab
- “Fast” tier of the LTX-2 family — lowest cost and quickest turnaround for drafts and social clips
- Native audio (dialogue/ambience/SFX/music) included by default
- Wallet-based per-second pricing; no extra contracts or LTX Studio account needed
Best use cases
- Rapid social clips and ads with synced audio
- Concept tests before premium renders
- Story beats and mood pieces up to 20 seconds
- Vertical reels that need quick iteration
How LTX-2 Fast works in MaxVideoAI
Pick text or image mode, set 6–20 seconds, choose resolution and fps, then prompt. Audio is on by default and can be toggled off.
For 12–20s runs we automatically constrain to 1080p/25 fps to keep routes stable.
Workflow
- Select LTX-2 Fast, choose Text → Video or Image → Video
- Set duration (6–20s) and aspect ratio 16:9
- Pick resolution/fps (12–20s = 1080p/25)
- Toggle audio on/off, add prompt and optional seed/negative
- Upload one reference still for I2V
- See live price, then generate
Real Specs – LTX-2 Fast in MaxVideoAI
Specs reflect the live routing via Fal today.
Resolution
- 1080p (1920×1080)
- 1440p (2560×1440)
- 2160p / 4K (3840×2160)
Aspect Ratio
- 16:9 (horizontal); best for social landscape or widescreen crops
Inputs & File Types
- Text prompts (shot-level instructions)
- Image → Video: single still (PNG/JPG/WebP), ~25 MB
- Negative prompt and seed supported
Audio
- Native audio enabled by default
- Toggle off for silent drafts
Pricing
- $0.04/s @1080p; $0.08/s @1440p; $0.16/s @4K
- Wallet-based pay-as-you-go inside MaxVideoAI
LTX-2 Fast examples
Recent LTX-2 Fast renders with audio on/off for social clips and quick iterations.
View all LTX-2 Fast examples →
LTX Video 2.0 Fast · 8s
18–20 second 16:9 continuous shot inside a bright startup office during the day. The camera starts in a wide shot at the…
Recreate this shot →
LTX Video 2.0 Fast · 8s
8 second 16:9 cinematic shot at a busy city crosswalk at golden hour. The camera starts behind a young woman with a…
Recreate this shot →Prompt ideas for LTX-2 Fast
Stay concise but write for picture and sound: subject/action, camera, lighting, duration, aspect, then a clear audio note.
1Subject + setting (1–2 beats you can see and hear)
2Camera move and pacing
3Lighting/grade and mood
4Duration & resolution (note 12–20s = 1080p/25)
5Audio on/off with ambience/dialogue/SFX/music, or “mute”
Cinematic [subject] in [environment], [camera move], [lighting/style], [duration 6–20s], 16:9, audio [on/off] with [short ambience/dialogue/SFX/music note].
Use 50 fps for 6–10s when you want crisper motion.
Image-to-Video tips
Upload a single sharp still and direct the motion and audio.
- Upload 1 still (PNG/JPG/WebP, ~25 MB)
- Set duration and fps; 12–20s lock to 1080p/25
- Describe the camera move, pacing, and audio
- Great for quick animatics from reference frames
- Keeps brand/product framing consistent
Sequenced clips
Chain multiple 6–10s renders to build longer beats.
Use seeds to keep look consistency across clips.
- Keep one subject; reuse the same prompt backbone
- Stitch in your editor; add VO/music there
Demo prompt – fast social clip
Audio on8s
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…
View render →8s landscape social
Tracking shot of a runner at golden hour on a boardwalk, camera follows from low angle, warm lens flare, gentle ocean ambience, audio on.
- Single-beat action
- Clear camera move and mood
- Audio cue baked in
Tips & limitations
- Fast 6–20s renders with native audio
- Up to 4K, 25 or 50 fps for quick iteration
- Simple per-second pricing with live chip
- 12–20s runs are locked to 1080p/25 fps
- Only 16:9 in this routing
- One reference image for I2V; no multi-image control
Safety & suitability
- Avoid harmful, hateful, or violent prompts
- No sexual content or exploitation
- Do not mimic real public figures without rights
- Keep prompts brand-safe; borderline content may be blocked
Best for brand-safe social/ads; keep dialogue short and clean.
When to pick LTX-2 Fast
- Use Fast for rapid social clips; switch to LTX-2 Pro for premium polish
- For multi-aspect needs, pair with Wan or Veo; Fast is 16:9 only
- For silent drafts, toggle audio off to reduce cost
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.
Explore other engines
Try a premium or vertical-first alternative next.
lightricks
LTX Video 2.0 Pro
Create high-fidelity cinematic AI videos with LTX-2 Pro. Text and image to video with synchronized audio, up to 4K and 50 fps, ideal for premium campaigns and production work.
Compare LTX-2 Fast vs Pro →openai
OpenAI Sora 2
Create rich AI-generated videos from text or image prompts using Sora 2. Native voice-over, ambient effects, and motion sync via MaxVideoAI.
Compare LTX-2 Fast vs Pro →openai
OpenAI Sora 2 Pro
Create longer, more immersive AI videos from text or images using Sora 2 Pro. Native voice, ambient sound, prompt chaining, and advanced control via MaxVideoAI.
Compare LTX-2 Fast vs Pro →Ready to try LTX-2 Fast? Load your wallet and see the live price chip before you run.
Swap to LTX-2 Pro when you need maximum fidelity and synced audio.
Open LTX-2 Fast in Generate →