StepFun: Step 3.5 Flash chat

openrouter
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....

Capabilities

Context Window 262k tokens
Max Output 65k tokens
Inputs
Outputs

Pricing (per 1M tokens)

Input $0.10
Output $0.30
Cache Read -
Cache Write -

Supported Parameters

frequency_penaltyinclude_reasoninglogit_biasmax_tokensmin_ppresence_penaltyreasoningrepetition_penaltyresponse_formatseedstoptemperaturetool_choicetoolstop_ktop_p

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