Microsoft announced changes to its Copilot Studio enterprise platform on October 27, 2025. According to the official documentation (Microsoft Learn), the GPT-4o model is being retired from default use. It will be replaced by the newer GPT-4.1 model, which the company states provides improved performance, reliability, and stability for enterprise customers. The GPT-4o model will be fully deprecated on November 26, 2025, although customers can still temporarily opt-in to use it until that date. This move highlights the rapid iteration of models in enterprise AI solutions and Microsofts focus on ensuring predictable and stable product performance, even if it means replacing a well-known model with a newer, less-hyped version.
Microsoft Copilot Studio Retires GPT-4o Model, Replacing it with GPT-4.1
