Hugging Face (Twitter)

RT @StepFun_ai: ⚡️ 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:...

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