Step 3.7 Flash
StepFun · 2026-05-29 · 201.4B parameters
Step 3.7 Flash is StepFun's multimodal Mixture-of-Experts model released on May 29, 2026. It is marketed as a 198B model combining a 196B sparse language backbone with a 1.8B vision encoder; the complete released checkpoint contains 201,365,316,160 parameters. Activating approximately 11B parameters per token, it is designed for agentic workflows, coding tasks, and search-augmented pipelines.