StepFun Releases Step 5 Preview Open Weights: 600B MoE, 27B Active, 1M Context

MarkTechPost
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StepFun has open-sourced the Step 5 Preview model, a sparse Mixture-of-Experts AI with 600 billion parameters, 27 billion active per token, and support for up to 1 million tokens of context, aimed at long-horizon agentic tasks.

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