FLUX 3 API
FLUX 3 is the next-generation model family from Black Forest Labs, announced on July 23, 2026. The first announced release is FLUX.3 Video, a video generation model designed around native audio, multimodal control, and longer structured sequences. FLUX.3 Image is planned for a later Early Access release.
Confirmed FLUX.3 Video capabilities
Section titled “Confirmed FLUX.3 Video capabilities”The following capabilities come from the official FLUX.3 announcement and FLUX 3 product page:
| Area | Officially announced capability |
|---|---|
| Duration | Up to 20 seconds of generated video |
| Audio | Native audio, including multilingual dialogue |
| Text control | Text-to-video generation |
| Image control | Image-to-video with a start frame or reference image |
| Video control | Video-to-video generation |
| Continuation | Video and audio continuation |
| Timeline control | Keyframe-to-video generation |
| Story structure | Multi-shot chaining |
| Availability | FLUX.3 Video Early Access; public product page marked Coming Soon |
What is not confirmed yet
Section titled “What is not confirmed yet”The production API contract is not public yet. HiAPI will not guess or copy parameters from another FLUX model. The following details remain pending:
- Production model IDs and available variants
- Request field names, required inputs, enums, defaults, and limits
- Resolution, duration, audio, and reference-media combinations exposed by the API
- Pricing and billing dimensions
- Final availability date
Until those details are published, there is intentionally no provisional request example on this page.
What FLUX 3 is designed for
Section titled “What FLUX 3 is designed for”- Native-audio short films — generate picture, ambience, effects, and multilingual dialogue as one coordinated result.
- Reference-guided animation — start from a frame or reference image while preserving the intended subject and visual direction.
- Video transformation and continuation — restyle existing footage or extend a video and its audio beyond the source clip.
- Keyframed and multi-shot sequences — control important timeline states and chain multiple shots into a structured sequence.
HiAPI launch preparation
Section titled “HiAPI launch preparation”HiAPI has reserved the model ID flux-3 as a Coming Soon entry. The public parameter schema, task mapping, and pricing will only be added after the production API is available and verified end to end.
At launch, this page will be updated with:
- The exact
/v1/tasksrequest schema - Copy-ready curl, Python, and Node.js examples
- Input constraints and supported media formats
- Live pricing and billing examples
- Tested output and polling behavior
Is the FLUX 3 API available now?
Section titled “Is the FLUX 3 API available now?”Not yet on HiAPI. Black Forest Labs lists the product as Coming Soon, and FLUX.3 Video is currently in Early Access.
How long can FLUX.3 Video generate?
Section titled “How long can FLUX.3 Video generate?”The official announcement states up to 20 seconds. The exact duration options exposed by the production API have not been published yet.
Does FLUX.3 Video generate audio?
Section titled “Does FLUX.3 Video generate audio?”Yes. Native audio and multilingual dialogue are confirmed capabilities. Exact audio controls and supported combinations will be documented after the API contract is published.
Does FLUX 3 support image-to-video and video-to-video?
Section titled “Does FLUX 3 support image-to-video and video-to-video?”Yes. Black Forest Labs has announced image-to-video with start-frame or reference-image control, plus video-to-video generation.
Is FLUX.3 Image included in this entry?
Section titled “Is FLUX.3 Image included in this entry?”No. This Coming Soon entry tracks FLUX.3 Video. Black Forest Labs says FLUX.3 Image Early Access is planned later, and it will be documented separately once its API surface is known.
How should I prepare an integration?
Section titled “How should I prepare an integration?”Keep the generation workflow behind a model-specific adapter and use HiAPI’s unified async API for task lifecycle handling. Do not hard-code FLUX 3 input fields until the verified schema is published here.