StepFun's Step 5 Preview Lands in Tencent WorkBuddy, Free Until October 25

StepFun announced on October 12 that its Step 5 Preview model is now available in WorkBuddy, Tencent's AI-native office agent, free to use exclusively until October 25. The model has 600B total parameters (27B active) in a sparse MoE architecture with a 1M-token context window. StepFun plans to open-source the full weights on October 15.

• Step 5 Preview is free in WorkBuddy from October 12 to October 25
• Model: 600B MoE parameters, 27B active, 1M-token context window
• StepFun will release full open weights on October 15
• WorkBuddy already lets users pick models from several outside labs