StepFun on X: “Introducing Step 5 Preview: Advancing the Pareto Frontier. Step 5 Prev…”

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@StepFun_ai

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.

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Sep 20, 2026, 3:15 AM UTC

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StepFun on X: “Introducing Step 5 Preview: Advancing the Pareto Frontier. Step 5 Prev…” | PeekX