All Models
StepFun AI Models
Chinese AI lab building multimodal foundation models. Known for the Step model family, backed by Tencent.
- Founded 2023
- Shanghai, China
- 4 Models
- Website
Step 5 Preview
Stepfun
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
Context1.0M
Speed145 tok/s
InputText, Image, Video
OutputText
ReasoningYes
Step 5 Preview
StepFun
A powerful AI model for general-purpose tasks.
ContextN/A
Speed92 tok/s
InputN/A
OutputN/A
ReasoningNo
Step 3.7 Flash
StepFun
A powerful AI model for general-purpose tasks.
ContextN/A
Speed223 tok/s
InputN/A
OutputN/A
ReasoningNo
Step 3.7 Flash
Stepfun
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...
Context256K
Speed223 tok/s
InputText, Image, Video
OutputText
ReasoningYes