StepFun has released Step 5 Preview as open weights. FP8 and BF16 checkpoints are live on Hugging Face and ModelScope. Step 5 Preview is a sparse Mixture-of-Experts model from StepFun built for long-horizon agentic work…
开放权重的发布会对闭源定价形成压力、扩大可及性,改变整个生态「自建 vs 采购」的权衡。
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