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Black Forest Labs Unveils FLUX 3 Action, a 7B Open-Weight Robotics Model Leading RoboLab

September 23, 2026 at 13:49 EDT

Robotics
Open Source
Foundation Models

Black Forest Labs has unveiled FLUX 3 Action, a 7-billion-parameter open-weight World Action Model for robotics that now appears at the top of NVIDIA's RoboLab-120 leaderboard with a 42.9% success rate. The release moves the FLUX 3 family beyond media generation into robot control, pairing future-frame prediction with action generation for physical tasks.

September 23, 2026 - Black Forest Labs

A 7B robot policy moves to the top

FLUX 3 Action pairs future-scene prediction with robot-control actions, reaching 42.9% on RoboLab-120 while staying smaller than the 16B Cosmos3-Nano-Policy comparison.

42.9%

RoboLab-120 success

parameters

+6.1

points over Cosmos3

next actions per step

Model Size Comparison

One block equals 1B parameters.

FLUX 3 Action

16B

Cosmos3-Nano-Policy

How the Policy Loops

Observecamera frames and robot state

Predicthow the scene should change

Actemit the next control actions

Repeatobserve the updated world

Observe -> predict -> act -> observe again.

Why builders care

Open weights, code and recipes are planned, so teams can fine-tune on their own robot demonstrations instead of training a foundation model from scratch.

What remains open

Final license terms, Action API pricing and outside replication on real robots are still unresolved.

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