Black Forest Labs releases FLUX Video Upscale for regenerating video at up to 4K

On August 20, 2026, Black Forest Labs released FLUX Video Upscale, a standalone FLUX Tool and API endpoint that regenerates video from 480p and up at a higher resolution, up to native 4K.

Archive entry: this covers an event from August 20, 2026, and we published it on November 8, 2026. The details come from sources dated at the time and may have changed since.

On August 20, 2026, Black Forest Labs (BFL) released FLUX Video Upscale, a standalone FLUX Tool and API endpoint that regenerates video at a higher resolution, up to native 4K. BFL announced it in a blog post by Cyril Diagne.

What FLUX Video Upscale does

Input and output: it accepted video from 480p and up and regenerated it at a higher resolution, up to native 4K. BFL said it understood FLUX 3 output natively.
Scale factors: the upscale_factor parameter accepted 1.5, 2 or 3; from an HD input, those factors landed at roughly 1080p, 2K and 4K.
Precise mode: 4 steps at $0.07 per mp/s, which BFL described as better for keeping identity or reference details consistent.
Creative mode: 8 steps at $0.10 per mp/s; BFL said it could change or replace identity.
Targeted flaws: BFL said the tool targeted flaws such as smudged faces or gridded artifacts on textures such as water and grass.

What it meant for people building with AI video

For teams generating video with FLUX 3 or other models, the release gave a priced API path to 2K and 4K deliverables. BFL described the tool as able to regenerate any video from 480p up, so it was not limited to FLUX 3 clips. The two modes also put a trade-off in the settings: Precise to keep identity and reference details consistent, or Creative, which could change or replace identity.

Availability at launch

FLUX Video Upscale was available through the BFL API and playground under the model name flux-3-upscale. BFL listed documentation at docs.bfl.ai/flux_tools/flux_video_upscale.

Sources

FLUX Video Upscale: 2K and 4K (Black Forest Labs, August 20, 2026, official)

Written with AI assistance, strictly from the sources listed above. Before it went live, automated checks verified its dates, sources and every language edition.