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StepFun AI Models

Chinese AI lab building multimodal foundation models. Known for the Step model family, backed by Tencent.

Founded2023Shanghai, China1 ModelWebsite →
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Step 3.5 Flash

StepFun

Step 3.5 Flash is StepFun's most capable open-source foundation model.

Context262K
Speed209 tok/s
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ReasoningYes
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