StepFun Launches Step 5 Preview: Agentic AI With 1M Context and Vision

StepFun 5 hours ago

Key Info

StepFun has released Step 5 Preview, its new flagship model designed for agentic work, targeting frontier-level performance in software engineering and professional knowledge tasks while emphasizing lower cost compared to comparable models.

Highlights

Model specs: 600B total parameters with 27B active in a MoE architecture, supporting a 1M-token context and vision input.
Capability focus: Strong in software engineering, sustained long-horizon execution, and professional knowledge work, particularly finance.
Efficiency: Notably lower task cost at comparable intelligence, making it attractive for agentic or multi-step workflows.

Original post

Introducing Step 5 Preview: Advancing the Pareto Frontier. Step 5 Preview is our new flagship model for agentic work, delivering frontier-level performance across software engineering and professional knowledge work, with particular strength in finance. - 600B total / 27B active MoE, with 1M context + Vision - Substantially lower task cost at comparable intelligence - Broad software engineering capabilities with sustained execution over long horizons Try Step 5 Preview: https://t.co/fC7HHlWKFn Model page: https://t.co/4caJR2YGD3 Open weights on Oct 15.

#StepFun#Step 5 Preview#agentic AI

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