Stepfun.

StepFun: Step 3.7 Flash

multimodal

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with ...

StepFun: Step 5 Preview

multimodal

Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total p...

StepFun: Step 3.5 Flash

199B

Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it select...