StepFun: Step 3.7 Flash
Stepfunllm
Published May 28, 2026
About
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 per token. The model supports a 256K context window and exposes selectable reasoning levels (high/medium/low), letting callers trade off speed, cost, and depth of reasoning. Designed for coding, agentic workflows, structured outputs, and long-context productivity tasks.
Try StepFun: Step 3.7 Flash
Test this model in the Sandbase Playground with your own prompts.
Open in Playground