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FLUX 3 Text to Video: AI Video Generator

Generate cinematic video with native synchronized audio using FLUX 3 Text to Video by Black Forest Labs. Try free — pay per generation, no subscription.

Interactive model controls

FLUX 3 Text-to-Video generates cinematic video clips with optional native synchronized audio from a single unified model — the same architecture Black Forest Labs uses for FLUX 3's action-prediction research. Expect coherent motion, strong physical plausibility, and scene-appropriate ambient sound baked directly into generation.

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Overview

About this model

FLUX 3 Text-to-Video generates cinematic video clips — with optional native, synchronized audio — directly from a text prompt, using Black Forest Labs' unified image/video/audio architecture. FLUX 3 Video shares its core architecture with FLUX 3 Action, the same model family's action-prediction research, giving it stronger real-world physics and motion coherence than earlier video generators. Combine it with FLUX 3 Image to Video or FLUX 3 Video Extend for longer, multi-shot sequences, or compare it against Seedance 2 and Veo 3.

1Advertising: Generate short cinematic video ads with synchronized ambient audio from a brief.
2Social Media: Produce trend-ready short-form video content from a text idea.
3Previsualization: Storyboard scenes with realistic motion before committing to production.
4Concept Trailers: Create mood/concept trailers for games or films from a script excerpt.
5Education: Visualize physical processes or events with physically plausible motion.
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Pricing & Value

Cost analysis

muapiapp$0.25/sec (720p), $0.42/sec (1080p)

Pay-per-generation pricing, no subscription required. Audio generation included at no extra charge.

Fal.aiNot available

FLUX 3 Video is not yet listed on Fal.ai.

ReplicateNot available

FLUX 3 Video is not yet listed on Replicate.

** Competitor pricing is estimated based on similar model architectures and usage tiers.

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Technical Details

Configuration schema

Promptstring

Text prompt describing the video scene and motion.

Default ValueA drone shot glides over a bioluminescent forest at night, fireflies drifting between glowing trees, gentle mist rolling across the forest floor, cinematic color grading.
Aspect RatioEnum (6 options)

Aspect ratio of the output video.

Default Value16:9
Durationint

Video duration in seconds.

Default Value5
ResolutionEnum (2 options)

Output video resolution.

Default Value720p
Generate Audioboolean

Whether to generate synchronized native audio for the video.

Default Valuetrue
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Implementation Guide

Developer documentation

How to Use FLUX 3 Text to Video

  1. Write a scene-driven prompt — describe subject, action, environment, camera movement, timing, mood, lighting, and visual style.

  2. Configure output — set aspect_ratio (21:9 to 9:16), resolution (720p or 1080p), and duration (5–20 seconds).

  3. Toggle generate_audio to generate synchronized native audio at no extra charge.

  4. Submit the request:

curl -X POST https://api.muapi.ai/api/v1/flux-3-text-to-video \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "A drone shot glides over a bioluminescent forest at night, fireflies drifting between glowing trees", "aspect_ratio": "16:9", "resolution": "1080p", "duration": 10, "generate_audio": true}'
  1. Poll /api/v1/predictions/{request_id}/result until status reaches completed, then read the video URL from outputs.
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Common Questions

Frequently asked

What is FLUX 3 Text to Video?

It's Black Forest Labs' text-to-video mode within the FLUX 3 family, generating cinematic clips with optional native synchronized audio from a single unified multimodal model.

Does FLUX 3 generate audio with video?

Yes. FLUX 3 Video supports native audio generation synchronized to the video, controlled via the `generate_audio` parameter, at no extra charge.

What resolutions and durations does FLUX 3 Text to Video support?

720p and 1080p resolution, with durations from 5 to 20 seconds. Duration is billed rounded up to the next whole second.

How is FLUX 3 Video different from FLUX 3 Action?

Both share the same underlying architecture. FLUX 3 Video is tuned for creative video generation, while FLUX 3 Action extends the same physical-world understanding to action/robotics prediction.

How much does FLUX 3 Text to Video cost?

Muapi bills $0.25/second at 720p and $0.42/second at 1080p, rounded up to the next whole second, capped at 20 seconds. A 10-second 720p clip costs $2.50.

Can I extend or upscale a FLUX 3 video afterward?

Yes — use [FLUX 3 Video Extend](/playground/flux-3-video-extend) to continue a clip with new prompt-guided motion, or [FLUX 3 Video Upscaler](/playground/flux-3-video-upscaler) to raise resolution beyond the native 720p/1080p output.