Microsoft CopilotmodelClaude Sonnet 5 and GPT-5.5 Chat in Copilot Studio (Generally Available)
You can pick Claude Sonnet 5 or GPT-5.5 Chat as the main model driving a Copilot Studio agent.
Details
- Both are generally available as an agent's primary model, chosen in the agent's model setting
- Microsoft credits the change to improved response quality and reasoning
- Using a model from outside Microsoft needs an administrator to turn on access to external models for the environment
- Some models require data processing and storage outside your organization's own geography
Best for
Tuning an agent's answer quality by swapping the model behind it
When to use it
The default model gives weak or inconsistent answers on your agent's particular task
Who benefits
Makers who want model choice rather than whatever Microsoft defaults to
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