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StepFun: Step 3.5 Flash (free)

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.

Context
262144
Modality
text->text
License
proprietary

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stepfun-ai/Step-3.5-Flash-FP8