StepFun Step 5 Preview flagship AI model
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 https://t.co/4PL29eb4lU
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Launched Sep 19, 2026View post
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StepFun Step 5 Preview flagship AI model ranked #1 today.