01 What happened
Microsoft has published new guidance on selecting primary AI models for Copilot Studio agents. The update clarifies differences between production and experimental models.
02 Key details
- Microsoft states experimental and preview models are for exploration only, not production, due to potential availability and quality limitations.
- GPT-5.3 Chat and GPT-5.4 Reasoning retire on October 15, 2026, and some models may be extended for up to 30 days.
- Safety evaluations found Grok-4.1 Fast less aligned with higher risks of harmful content; Microsoft recommends against production use.
- Administrators control access to preview models and cross-geo data movement through Power Platform admin center settings.
03 Why it matters
This helps developers avoid unsupported models and manage data privacy risks when choosing agents based on speed, cost, and safety benchmarks.
04 Who it matters to
AI developers, AI agent developers and enterprise AI service administrators.
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