Step-3.5-Flash

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A high-efficiency 196B MoE model for fast and reliable agentic intelligence.

byStepFun

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Description

Step-3.5-Flash is a Mixture-of-Experts model featuring 196B parameters (11B active) and a 256K context window. It demonstrates strong performance on SWE-bench Verified with a score of 74.4, specifically optimized for agentic intelligence and fast inference.

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Details

Why this is interesting: A high-performance frontier MoE model with impressive coding capabilities and a large context window, available with…
Attributed to: @stepfun-ai
Built with: North Mini Code Qwen3.7 Plus Gemini Omni LTX 2.3 Pro 3.1 Pro Seedream 5.0 Pro Vidu Q3 Pro Seedance 1.5 Pro Flux 2 Pro Nano Banana Pro Gemini 3 Pro Gemini 2.5 Pro Phi-3 Mini 4K
Links: View tweet
Tags: #llm #moe #agentic #open-weights

Discovered: X
First posted: X · Aug 21, 2026
Listed: Added 5d ago
Build: Strong
Models: Moderate

Step-3.5-Flash

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Step-3.5-Flash

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