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AI IntelligenceSep 21, 2026AI Intelligence

Article

StepFun releases Step 5 Preview open-source model with 27B active parameters

StepFun has released Step 5 Preview, an open-source model featuring 27 billion active parameters. The model ranks among the top two open-source models in recent evaluations, demonstrating strong performance despite its compact active parameter size.

Frontier EditorialSep 21, 2026Source: 量子位

Source Brief

StepFun releases Step 5 Preview open-source model with 27B active parameters: StepFun has released Step 5 Preview, an open-source model featuring 27 billion active parameters. The model ranks among the top two open-source models in recent evaluations, demonstrating strong performance despite its compact active parameter size.

AI Models open-source model StepFun Step 5 Preview large language model Read the issue

Source Brief

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