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black-forest-labs/flux-3/text-to-video
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BLACKFORESTLABS FLUX 3 Text-to-Video
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BLACKFORESTLABS FLUX 3 Text-to-Video API by Black Forest Labs

black-forest-labs/flux-3/text-to-video
Text-to-video

Generate a video (with audio) from a text prompt using FLUX 3.

モデルを比較

BLACKFORESTLABS FLUX 3 Text-to-Video は Black Forest Labs が開発したモデルです。Atlas Cloud(運営:Atlas Cloud AI LLC)は本モデルへのアクセスを提供するものであり、その所有者ではありません。すべての商標は各所有者に帰属します。

FLUX 3 Text-to-Video

FLUX 3 Text-to-Video generates cinematic videos with synchronized audio directly from a text prompt. Powered by Black Forest Labs' FLUX 3 architecture, it delivers high-fidelity motion, strong prompt adherence, and native audio generation — no post-processing required.

Why Choose This?

  • Native audio generation Produce video and audio together in a single request — dialogue, ambient sound, and music matched to the scene.

  • Explicit duration required Duration must be set explicitly to validate keyframe positions.

  • Auto aspect ratio Use auto to let the model pick the best fit, or specify any ratio from ultra-wide to portrait.

  • High resolution output Generate videos in 720p or 1080p.

  • Adjustable safety Fine-tune the safety tolerance from strict (0) to permissive (4).

Parameters

ParameterRequiredDescription
promptYesText description of the video to generate
aspect_ratioNoAspect ratio of the generated video. Default: auto. Options: auto, 21:9, 2:1, 16:9, 4:3, 1:1, 3:4, 9:16
resolutionNoVideo resolution. Default: 720p. Options: 720p, 1080p
durationNoDuration in seconds. Default: 5. Options: 5–20. Cannot be auto — required to validate keyframe positions
generate_audioNoWhether to generate audio. Default: true
safety_toleranceNoSafety level 0 (strictest) to 4 (most permissive). Default: 2
seedNoRandom seed for reproducibility

How to Use

  1. Write your prompt — describe the scene, subject, lighting, camera movement, and mood.
  2. Choose resolution — 1080p for final output, 720p for faster iteration.
  3. Set aspect ratio — use auto or pick a ratio to match your target platform.
  4. Set duration — use auto or specify a value (5–20 seconds).
  5. Run — submit and download your video.

Pricing

Billed per second of generated video, by resolution:

ResolutionCost per second
1080p$0.319
720p$0.187

Best Use Cases

  • Social Media Content — Short-form clips for TikTok, Reels, YouTube Shorts.
  • Concept Visualization — Bring ideas to life without filming.
  • Marketing Videos — Produce promotional content from text alone.
  • Storytelling — Create narrative scenes for creative projects.

Pro Tips

  • Be specific about camera movement: "slow dolly forward", "aerial tracking shot", "static wide angle".
  • Include lighting and atmosphere: "golden hour", "neon-lit rain", "foggy morning".
  • Describe sound in your prompt (e.g. "birdsong", "city ambience") — the model will match audio to it when generate_audio: true.
  • Use seed when iterating on prompt wording to isolate the effect of each change.

Notes

  • prompt is the only required field.
  • duration: "auto" and aspect_ratio: "auto" let the model decide; both can be overridden with explicit values.
  • Generation is asynchronous — submit, then poll for the finished video.

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