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Step 5 Preview

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05:42
2026-09-19
artificialanalysis.ai
large-language-models

Stepfun Step 5 Preview (LLM): On AA Pareto frontier

StepFun released Step 5 Preview on September 18, 2026, a reasoning model that scores 44 on the Artificial Analysis Intelligence Index, well above the median of 25 for comparable models. Step 5 Preview…

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