Building and customizing solutions using Microsoft 365 Copilot APIs and tools
Microsoft has not published official documentation in the provided sources that defines specific token limits for Microsoft 365 Copilot when using Anthropic or OpenAI models.
The supported facts are:
- Microsoft Copilot can use third-party AI models, including Anthropic and OpenAI models.
- Admins can decide whether to use certain third-party models for Copilot experiences, and additional terms can apply.
- AI models that power Microsoft Copilot are regularly updated, but those updates do not change security, privacy, or compliance settings.
- For consumer Microsoft 365 subscriptions, Microsoft documents feature usage limits and AI credits by plan, but that is different from publishing per-model token limits.
Based on the available Microsoft documentation here, there is no official Microsoft statement listing token windows, input token caps, or output token caps for Microsoft 365 Copilot models.