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StepFun's flagship Step 5 Preview model is now available inside Tencent's WorkBuddy office agent, with an exclusive free-use window running from October 12 to October 25.
Article URL: https://openrouter.ai/stepfun/step-5-preview Comments URL: https://news.ycombinator.com/item?id=50007764 Points: 118 # Comments: 27
Stepfun's Step 5 Preview MoE model takes on eight Kingbench coding tasks, from an archery game to local Gemma fine-tuning, scoring 83.75%.
StepFun launched Step 5 Preview on September 20, 2026: a ~600B sparse MoE (~27B active) with 1M context for long-horizon agents, API live now and BF16 open weights planned for October 15.
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