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Models mistral.ai 12 hours ago Primary Hot

Mistral AI Unveils Medium 3.5: 128B Open-Weight Model Crushing SWE-Bench at 77.6%

Mistral released Medium 3.5, a 128B dense multimodal model blending instruction-following, reasoning, coding, and vision with a 256k context window and configurable reasoning effort. It achieves frontier-level 77.6% on SWE-Bench Verified, powers async remote agents in Vibe for cloud coding sessions, and enables Work mode in Le Chat for multi-tool agentic workflows. Open weights under modified MIT license, self-hostable on 4 GPUs, API priced at $1.5/M input and $7.5/M output tokens.

Why it matters

A self-hostable European open-weight frontier model challenges Big Tech dominance, accelerating accessible agentic AI development.

Verified signal Primary Lab 3 sources Mistral Medium 3 5 Release

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Quick takes

Mistral Medium 3.5: 128B dense, 256k ctx, 77.6% SWE-Bench verified, open weights.
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Mistral Medium 3.5: 77.6% SWE-Bench, 256k ctx, open weights on 4 GPUs
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