⚡️ Step 3.5 Flash is coming: Fast Enough to Think. Reliable Enough to Act！ We’re dropping our most capable open-source foundation model yet. Frontier reasoning meets extreme efficiency. It leverages a sparse Mixture of Experts (MoE) architecture, 196B total → 11B active. Key Capabilities: Reasoning at Speed: MTP-3 powered throughput at 100–300 tok/s (350 tok/s peak for single-stream coding tasks). Agentic Power: 74.4% SWE-bench Verified 51.0% Terminal-Bench 2.0. Proven stability for complex, long-horizon tasks. 256K Efficient Context: 3:1 SWA ratio + Full Attention. Massive datasets or long codebases support with minimal overhead. Consistent performance, hybrid efficiency. Local-First Deployment: Optimized for Mac Studio M4 Max, NVIDIA DGX Spark. Secure, private, and frontier-capable. Your data, your hardware, your agent. You can try Step 3.5 Flash right now: OpenRouter: https://openrouter.ai/stepfun/step-3.5-flash:free… GitHub: https://github.com/stepfun-ai/Step-3.5-Flash… HuggingFace：https://huggingface.co/stepfun-ai/Step-3.5-Flash… Blog：https://static.stepfun.com/blog/step-3.5-flash/… ModelScope: https://modelscope.cn/models/stepfun-ai/Step-3.5-Flash… The Next：Step 4 training is officially LIVE！ We're calling on the world's boldest builders to co-creat the Step 4 right now. Let's define the Agentic Era together! Join our Discord：https://discord.gg/RcMJhNVAQc