FLUX 3 API | Together AI
FLUX 3
Multi-shot video generation with native audio from text, images, or keyframes
About model
FLUX 3 is Black Forest Labs' video generation model, built on a unified multimodal architecture that generates video and synchronized audio together. It produces clips of up to 20 seconds with multiple scenes and camera angles in a single take, starting from text, an image, or ordered keyframes. Audio is optional and native: multilingual speech with strong lipsync and accurate accents, plus sound effects and ambience generated with the frames. The model spans styles well beyond cinematic output, renders text and typography that feels native to the scene, and supports video continuation, extending an existing clip from its final frame with momentum, framing, and scene logic carried forward. Built on Self-Flow, Black Forest Labs' approach to aligning multimodal generation and understanding within one architecture. Available on Together AI.
Max Clip Length
- 20s
Multiple Scenes and Camera Angles
- In a single generation
Audio Generation
- Native
- Multilingual speech with strong lipsync, plus effects and ambience, generated with the frames
Frame-Level Control
- Keyframes
- Start, end, and ordered in-between frames, plus continuation from a clip's final frame
Model key capabilities
- Multi-Shot Generation: Multiple scenes and camera angles in one clip, with agentic chaining into longer cohesive stories
- Native Audio: Optional multilingual speech with strong lipsync and accents, plus sound effects and ambience generated with the frames
- Keyframe & Continuation Control: Direct generations with start, end, and ordered in-between keyframes, or extend an existing clip from its final frame
- Production-Ready Infrastructure: 99.9% SLA, available on Together AI serverless infrastructure
API usage
- cURL
- Python
- TypeScript
Model card
Architecture Overview:
- Unified multimodal architecture generating video and synchronized audio together, part of Black Forest Labs' FLUX 3 family spanning video, audio, and image generation
- Built on Self-Flow, Black Forest Labs' method for aligning multimodal generation and understanding within the same underlying architecture
- Generates clips of up to 20 seconds with multi-scene structure in a single pass
Training Methodology:
- Black Forest Labs reports Self-Flow achieves lower generation error across modalities than standard flow matching, and higher success rates on manipulation tasks through fine-tuning
Performance Characteristics:
- Handles simple and complex prompts across a broad stylistic range beyond conventional cinematic output
- Accurate multilingual speech with strong lipsync and accents in generated dialogue
- Text and typography rendered natively within scenes
- Video continuation carries momentum, framing, and scene logic forward from an existing clip's final frame
Prompting
Together AI API Access:
- Access FLUX 3 via Together AI APIs using the endpoint black-forest-labs/FLUX-3
- Authenticate using your Together AI API key in request headers
- Create a video request with a text prompt, optionally providing an image or ordered keyframes, then poll until the video completes
- Extend an existing clip by continuing from its final frame
- Available on Together AI serverless infrastructure
Applications & use cases
Filmmaking & Storyboarding:
- Generate multi-scene sequences with consistent direction in a single request
- Previsualize shots with keyframe control over start, end, and in-between frames
- Chain clips into longer cohesive stories through continuation from final frames
Advertising & Brand Content:
- Produce product and brand video with native typography rendered into the scene
- Generate campaign variations across styles from the same creative brief
- Add multilingual voiceover and dialogue with lipsync in the same generation
Explainers & Social Content:
- Create explainer videos and social clips with speech, effects, and ambience in one pass
- Turn a single image into a moving, sounding clip for feeds and stories
- Batch-generate localized variants with multilingual dialogue through the Together API
Model details
- Model provider: Black Forest Labs
- Type: Video
- Resolution/Duration: Up to 20s
- Deployment: Serverless
- Endpoint: black-forest-labs/FLUX-3
- Price: $0.17 / video estimated per video
- Input modalities:
- Text
- Image
- Video
- Output modalities: Video
- Category: Video