Open Weight Model

StepFun releases open weights for Step 5 Preview, a 600B model with 27B active parameters: StepFun released open weights for its Step 5 Preview model, with 600B total and 27B active parameters and a 1M context window. It published a technical blog describing the model's 92-layer design, sparse grouped-query attention, and long-horizon agent training.

StepFun • Pandaily

Nvidia • Nvidia

Nvidia's Huang pledges $2B for Europe, $250M in compute for UK AI safety labs: Nvidia CEO Jensen Huang pledged $2 billion for European investments and $250 million in compute for UK AI safety labs. Nvidia also took new stakes in French startups Doctolib and Entalpic. Huang pitched open-weight models as Europe's way to close the AI gap.