What Flux (Black Forest Labs) is
Black Forest Labs is a frontier AI lab whose FLUX line of models generates images, video, audio, and action predictions. The current release is FLUX 3, a single multimodal model covering image, video, audio, and action-prediction, with stylistically diverse outputs, native audio, and up to 20-second clips generated in one pass from text, an image, or keyframes. FLUX Video Upscale extends output to 2K and 4K.
Funding snapshot
Black Forest Labs received an initial investment of US$31M, announced 1 August 2024, from investors including Andreessen Horowitz, Brendan Iribe, Michael Ovitz, Garry Tan and Vladlen Koltun (source: Wikipedia). For the later round the figures conflict: a company Series B announcement carried by Yahoo Finance and a Pulse 2.0 report describe US$300M led by AMP and Salesforce Ventures at a US$3.25B post-money valuation in late 2025, while Wikipedia's end-2025 entry instead lists US$450M offered by AMP, Salesforce Ventures, Samsung, Adobe, Telekom and Canva. Both figures are noted here rather than merged, since no single figure is confirmed across all sources.
Key features
- FLUX 3 multimodal model (image, video, audio, action-prediction)
- Up to 20-second generated video clips in a single generation, starting from text, an image, or keyframes
- Multilingual speech, effects, and ambience generated with the frames
- Real-world image grounding and accurate text rendering
- FLUX Video Upscale to 2K and 4K for video
- MCP server for Claude Code, Codex, Cursor, VS Code, and Devin
Where it lives
Alternatives to consider
Related reading
5 pieces from AIUnpacker on Flux (Black Forest Labs)
Guides and articles
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Sources & media
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