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Mistral releases Medium 3.5, a 128-billion-parameter open model, and cloud coding agents

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Mistral released Mistral Medium 3.5, a 128-billion-parameter open-weights model for long-horizon coding and productivity, priced at $1.5 and $7.5 per million input and output tokens, and moved its coding agents to the cloud in Mistral Vibe and Le Chat, along with a Work mode for multi-step tasks.

Why it matters

European businesses got an open model sized for agent work from a European provider.

When
22 May 2026
ID
WTA-N-2026-0208
Who
Mistral AI

Summary by wheresthe.ai, from Mistral AI. Checked against the source on 10 Oct 2026.

Source copy: download the page as saved on 18 Oct 2026 (PDF). Also held by the Internet Archive.

Next stop on this Storyline: What happened nextMistral previews Large 4, a 1-trillion-parameter model with weights due by end of October

Cite this story

WTA-N-2026-0208: “Mistral releases Medium 3.5, a 128-billion-parameter open model, and cloud coding agents.” wheresthe.ai, 22 May 2026. https://wheresthe.ai/d/eu-mistral-medium-3-5-remote-agents-2026-05/ (source: Mistral AI: Remote agents in Vibe).

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