{"id":7842,"date":"2026-05-28T01:45:00","date_gmt":"2026-05-28T08:45:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/microsoft-copilot\/blog\/?post_type=copilot&p=7842"},"modified":"2026-05-28T12:55:34","modified_gmt":"2026-05-28T19:55:34","slug":"mistral-joins-copilot-studios-growing-lineup-of-model-providers","status":"publish","type":"copilot","link":"https:\/\/www.microsoft.com\/en-us\/microsoft-copilot\/blog\/copilot-studio\/mistral-joins-copilot-studios-growing-lineup-of-model-providers\/","title":{"rendered":"Mistral joins Copilot Studio’s growing lineup of model providers"},"content":{"rendered":"\n

As organizations around the world continue to bring more agents into production, there’s a growing demand for AI models that align with regional expectations around data handling and control. Microsoft Copilot Studio<\/a> aims to meet this need by combining model flexibility with enterprise-grade governance, empowering teams to choose the best model for a given scenario while maintaining control over how and where data is processed.<\/p>\n\n\n\n

Today, we\u2019re expanding that choice with the addition of Mistral Medium 3.5 <\/strong>for agent building and orchestration. Medium 3.5 is currently available worldwide for customers in early release environments.<\/p>\n\n\n\n

For organizations in the European Union (EU), this model has the added benefit of providing more flexibility in how their agents <\/a>are powered, while keeping data processing in-region. It also helps these teams avoid the extra procurement overhead that can come with adding a new model provider.<\/p>\n\n\n\n

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Learn more about model choice in Copilot Studio<\/a><\/div>\n<\/div>\n\n\n\n

Medium 3.5, per Mistral, was built for \u201clong-horizon tasks, calling multiple tools reliably, and producing structured output that downstream code can consume.\u201d Reasoning effort is configurable per request, so the same model can answer a quick chat reply\u2014or, alternatively, work through a complex agentic run. You can read more about this model on Mistral\u2019s blog<\/a>.<\/p>\n\n\n\n

Model access and admin controls<\/h2>\n\n\n\n

\n We’re rolling out Medium 3.5 for customers in early release environments. As an experimental model, we recommend using it in non-production scenarios while testing and evaluations are completed.\n<\/p>\n\n\n\n

\n As with all external model providers in Copilot Studio, admins stay in control:\n<\/p>\n\n\n\n

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  1. Opt in via the Microsoft 365 admin center<\/a><\/strong> to allow the Mistral Medium 3.5 preview for your tenant.<\/li>\n\n\n\n
  2. Enable external model providers in the Microsoft Power Platform admin center<\/a><\/strong> so makers in your selected environments can select Mistral Medium 3.5 in the Copilot Studio model picker.<\/li>\n<\/ol>\n\n\n\n

    \n Until both switches are on, the model will not appear to makers. This gives IT teams a structured path to pilot, evaluate, and expand usage on their terms.\n<\/p>\n\n\n\n

    Get started with Mistral Medium 3.5 in Copilot Studio<\/h2>\n\n\n\n