AI LABS · MAINLAND CHINA

StepFun 阶跃星辰

Products

Model API & platform

StepFun API阶跃星辰开放平台Source
Open platform for StepFun's Step multimodal model family.

Models

Step 3.7 Flash · May 29, 2026 · Global API
Step-2 · Jul 5, 2024 · China-only API

Latest Events

Oct 12, 2026Reportedly: StepFun's Step 5 Preview Comes to Tencent WorkBuddy, Free to Use Exclusively Until October 25
Sep 28, 2026Reportedly: StepFun launches Step 5 Preview, a ~600B MoE model with 1M context and open weights due Oct 15
Sep 22, 2026StepFun opens Step-Cookbook repository with Claude Code setup scripts