StepFun Step-1

Proprietary

About

StepFun's Step-1 model

Capabilities

VisionMultimodalReasoningFunction CallingTool UseJSON ModeCode Execution

Rankings

Cheapest LLM APIs

Specifications

FamilyStep

Released2025-08-20

Context128k

Created by

One of China's leading AI 'Six Tigers'.

Shanghai, China

Founded 2023