FLUX 3 unifies image, video and audio in one architecture, with an open-weight Dev backbone promised.

Black Forest Labs put FLUX 3 into early access July 23, trained jointly across modalities using their Self-Flow approach, a departure from the single-modality FLUX 2 line. BFL reports FLUX 3 video preferred over Runway Gen-4.5 in 77% of head-to-head comparisons and over Luma Ray 3.2 in 93%. Vendor-run preference testing, so discount accordingly, but the phased rollout covering Video, Image, Action and Dev is the thing. Open weights on a multimodal backbone changes what independent builders can do.