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The primary subject is an open-weight AI model release, so it passes the topic gate. Among the AI categories, "AI Products" fits best, since the article centers on a model being made available to developers rather than on research methods, policy, or hardware. Key facts for readers are the 600B total and 27B active parameter sparse MoE design, the 1M-token context window, and the FP8/BF16 checkpoints on Hugging Face and ModelScope. Claims about agentic performance are vendor-stated until independent benchmarks are published.
StepFun Releases Step 5 Preview Open Weights: 600B MoE, 27B Active, 1M Context
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. It has 600B total parameters, 27B active per token and up to 1M tokens of context. For developers, this is […] The post StepFun Releases Step 5 Preview Open Weights: 600B MoE, 27B Active, 1M Context appeared first on MarkTechPost.
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