OpenAI Ends Microsoft Cloud Exclusivity — Models Now Available on AWS, GCP Planned for Q4

Summary

On April 27, 2026, OpenAI and Microsoft announced an amended agreement that ends OpenAI's cloud exclusivity with Azure, allowing enterprises to call GPT-5.5, fine-tuned O3-series, and other OpenAI models through Amazon Bedrock for the first time. Google Cloud certification is targeted for Q4 2026. This is a structural shift: for three years, accessing OpenAI's frontier models required an Azure subscription, creating a de facto cloud bundling effect. The amended terms allow OpenAI to deliver serv