AI LABS · MAINLAND CHINA · MODEL APIS
StepFun 阶跃星辰
Focus: developer APIs. platform.stepfun.com
Use & access
Model access and license evidence applies to the named model. Check the official terms for availability in your country.
Products
Model API & platform
- StepFun API阶跃星辰开放平台
Open platform for StepFun's Step multimodal model family.
Verified model profiles
Model-specific conditions and evidence
- Step 3.7 Flash · May 29, 2026Global API · Access source · Apache-2.0 · License source
- Step-2 · Jul 5, 2024China-only API · Access source · License not verified
Recent model release coverage
Published Events; a news report does not establish a verified model profile.
Latest Events
- Reportedly: Ascend, MetaX, Biren and Moore Threads Announce Day-0 Support for StepFun's Step 5 Preview
- Reportedly: StepFun open-sources Step 5 Preview weights; Huawei Ascend, MetaX, Biren provide day-zero support
- Reportedly: StepFun's Step 5 Preview Comes to Tencent WorkBuddy, Free to Use Exclusively Until October 25
- Reportedly: StepFun launches Step 5 Preview, a ~600B MoE model with 1M context and open weights due Oct 15
- StepFun opens Step-Cookbook repository with Claude Code setup scripts