StepFun

Scale-up intelligence possibilities for everyone

340 followers

340 followers

StepFun is a frontier AI platform building powerful, actionable intelligence with the Step series of models.

Launch date

Step 5 Preview600B open weights, trained for long-running agents

Launched on October 17th, 2026

Step 3.7 FlashFlash-speed agents model that can see and act

Launched on May 30th, 2026

Step 3.5 FlashFrontier open-source MoE model built for OpenClaw agents

Launched on March 5th, 2026