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StepFun: Step 3.5 Flash

modeltested · static-verifiedscore 20/100signed passport ✓published 275d ago · verified 2026-10-24

Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....

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text->texttool-calling

model:openrouter:stepfun/step-3.5-flash