FLUX 3¶

Development line: project:flux-3 · thread flux-3-development
Last event: 2026-08-05 · 2 dated since 2026-07-24 · Researched: 2026-09-04 · confidence: medium

What it is¶

FLUX 3 is a BFL preview video model for creators and API teams who make short audiovisual shots.

• Video generation: text-to-video, image or keyframe-to-video, and video continuation run through the flux-3-video endpoint.
• Output specification: 24 fps video with synchronized speech, sound effects, and ambience.

Development line¶

• 2026-07-24 — Black Forest Labs published a FLUX 3 blog update. FLUX 3 entered Early Access as a unified multimodal model. Black Forest Labs staged Video, Image, Action, and Dev access separately.
• 2026-08-05 — FLUX 3 was linked across Black Forest Labs product surfaces. The model and Quick Start pages carry no dates. The linked Playground route returns an error.

What changed¶

2026-07-24 — The cited launch material is dated 2026-07-23: FLUX 3 entered Early Access as a unified multimodal model, while Video, Image, Action, and Dev access were staged separately. 2026-08-04 — BFL made an initial FLUX 3 Video generally available through its API and selected partners. 2026-08-05 — We can verify no separate capability release: the model and Quick Start pages are undated, and the associated Playground route now returns an error. 2026-08-20 — FLUX Upscale launched as a separate endpoint that can regenerate video up to native 4K.

How to use this¶

Consult the FLUX 3 model page, quick-start documentation, and prompt-to-image playground from 2026-08-05 before testing FLUX 3, so features and access stay verified against primary sources.

1. Create a BFL account, add credits, then use the Playground or the API. — https://docs.bfl.ai/flux_3
2. For a new clip, POST mode=t2v, a prompt, and optional duration to the /v1/flux-3-video endpoint with your BFL API key. — https://docs.bfl.ai/flux_3
3. For image-led video use mode=i2v with keyframes; for an extension use mode=v2v with start_video. — https://docs.bfl.ai/flux_3
4. Poll the returned polling_url until the job is Ready, then download the result before its signed URL expires. — https://docs.bfl.ai/flux_3
5. Prototype with draft=true; send the selected result's draft_cache in mode=draft_enhance to render that same shot at full quality. — https://docs.bfl.ai/flux_3

Best practices¶

• Use draft and draft_enhance after approving a preview, because a fresh full render can reinterpret the shot. — https://docs.bfl.ai/flux_3
• Pin keyframes to exact timestamps when a transition must be controlled; i2v accepts one to ten images, including start and end pins. — https://docs.bfl.ai/flux_3
• Download a Ready result promptly, because its signed URL expires after about two hours. — https://docs.bfl.ai/flux_3
• Use Upscale Precise mode when identity or reference detail must stay consistent, because Creative can change or replace identity. — https://bfl.ai/blog/flux-video-upscale

Superseded by this¶

• 2026-08-04: “FLUX 3 Video is available only through Early Access” is obsolete; BFL made an initial version generally available through its API and selected partners.

Still unknown¶

• The 2026-08-05 Playground URL currently returns an internal error, so we cannot verify its original model, prompt, and output.
• The 2026-08-05 source bundle mixes a prompt-to-image Playground route with current BFL documentation that exposes FLUX 3 as video; without the original source text, we do not know whether this is the same FLUX 3 product or a generic dashboard link.
• The first-party public sources checked do not establish a release date or public endpoint for FLUX 3 Image, FLUX 3 Dev, or FLUX 3 Action after their staged launch plans.

Sources¶

Agent brief¶

• Subject: project:flux-3, thread flux-3-development, 2 dated events 2026-07-24 → 2026-08-05.
• Practical note: Consult the FLUX 3 model page, quick-start documentation, and prompt-to-image playground from 2026-08-05 before testing FLUX 3, so capabilities and eligibility stay confirmed against primary sources.
• Confidence: medium. Dated supersedes above are the authority for what is obsolete.