Step 5 Preview · deepinfra

Step 5 Preview is StepFun's flagship model for agentic work. It is a sparse Mixture-of-Experts model with 600B total parameters and 27B active per token, a 1M-token context window, and text and image input. It delivers frontier-level performance in software engineering, long-horizon agentic execution with repeated tool calls, and professional knowledge work, with particular strength in finance.

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Input, $/1M $1.00

Output, $/1M $2.70

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Last checked 04.11.2026 12:00:14 UTC

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