FLUX Video Upscale — Black Forest Labs¶

Development line: project:flux-video-upscale · thread black-forest-labs
Last event: 2026-08-21 · 1 dated since 2026-08-21 · Researched: 2026-09-05 · confidence: high

What it is¶

FLUX Video Upscale is a FLUX 3 video super-resolution endpoint for API users.

• Video upscaling at 1.5×–3× scale, up to 4K.
• Precise mode for identity-sensitive footage and Creative mode for generated detail.
• Audio preservation for the source audio track.

Inputs are at most 20 seconds, 50 MB, and 2560×1440; output frames cap at about 14.4 MP.

Use Precise for faces, products and brand assets; use Creative for generated scenery and textures where detail matters more than exact identity.

Development line¶

• 2026-08-21 — Black Forest Labs introduced FLUX Video Upscale. On 2026-08-21, Black Forest Labs linked an official blog announcement, product documentation, and a playground model for FLUX Video Upscale. The official links establish the public introduction, but do not show detailed capabilities, availability, pricing, or performance.

What changed¶

2026-08-21 — FLUX Video Upscale became available as the standalone POST /v1/flux-tools/video-upscale-v1 tool, following BFL’s August 20 release. The launch added 1.5×–3× video super-resolution, two creativity modes, preserved audio, and output-only pricing.

2026-08-26 — BFL’s current tool catalog listed Video Upscale alongside its other editing endpoints, confirming its role as a FLUX Tool with the same asynchronous submit-and-poll workflow.

How to use this¶

From 2026-08-21, we evaluate FLUX Video Upscale through Black Forest Labs’ documented workflow and linked playground rather than treating it as an unannounced or undocumented capability.

1. Prepare an MP4 no longer than 20 seconds and either host it at an accessible HTTPS URL or encode it as base64. — https://docs.bfl.ai/flux_tools/flux_video_upscale
2. POST input_video, an upscale_factor from 1.5 to 3, and creativity to /v1/flux-tools/video-upscale-v1. — https://docs.bfl.ai/flux_tools/flux_video_upscale
3. Poll the returned polling_url until status is Ready, then download result.sample before its signed URL expires. — https://docs.bfl.ai/flux_tools/flux_video_upscale

Best practices¶

• Use creativity: 0 for faces, products, logos and other material whose identity must remain stable. — https://docs.bfl.ai/flux_tools/flux_video_upscale
• Use creativity: 1 for generated footage, textures, crowds and scenery; add a short content prompt only when steering invented detail is useful. — https://docs.bfl.ai/flux_tools/flux_video_upscale
• Upscale the least-compressed source after editing and trimming, so artifacts are not amplified and output-only billing covers only retained footage. — https://docs.bfl.ai/flux_tools/flux_video_upscale

Superseded by this¶

• Nothing marked obsolete yet.

Still unknown¶

• Our entry dates the event to 2026-08-21, while BFL’s first-party release note and blog date the launch to 2026-08-20; distribution was likely logged one day later.
• We had no independently accessible playground response during research, so current browser UI controls and account-tier availability were not verified.

Sources¶

Agent brief¶

• Subject: project:flux-video-upscale, thread black-forest-labs, 1 dated events 2026-08-21 → 2026-08-21.
• Practical note: From 2026-08-21, evaluate FLUX Video Upscale through Black Forest Labs’ documented workflow and linked playground rather than treating it as an unannounced or undocumented capability.
• Confidence: high. Dated supersedes above are the authority for what is obsolete.