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StepFun

Browse models provided by StepFun

1 model

Tokens processed on OpenRouter

  • StepFun: Step 3.5 FlashStep 3.5 FlashFree variant

    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. It is a reasoning model that is incredibly speed efficient even at long contexts.

    by stepfun256K context$0/M input tokens$0/M output tokens