Following its full-fledged open-source launch on March 4th, StepFun's latest-generation foundational model, Step 3.5 Flash, has witnessed a meteoric rise in global popularity. It has clinched the number one position on OpenClaw's global model usage leaderboard for two days running. According to reports, the StepFun algorithm team has gone above and beyond by open-sourcing not just the Step 3.5 Flash model itself, but also its pre-training weights, intermediate training weights for this Agent foundational model, as well as the accompanying Steptron training framework.
