OpenAI moves models to AWS

OpenAI and Amazon Web Services said on April 28 that OpenAI models, Codex, and Managed Agents are coming to Amazon Bedrock in limited preview. (openai.com) (aws.amazon.com) Amazon said Bedrock customers can use OpenAI models through the same Bedrock APIs they already use for model access, fine-tuning, and orchestration. AWS also published a Bedrock page listing GPT-5.5 and GPT-5.4 in preview. (aws.amazon.com 1) (aws.amazon.com 2) OpenAI said Codex on Bedrock brings its coding agent into AWS environments, and Amazon said Managed Agents powered by OpenAI are aimed at production-ready agent deployments. Amazon announced the products at its “What’s Next with AWS” 2026 event. (openai.com) (aws.amazon.com) Bedrock is Amazon’s managed marketplace and tooling layer for artificial intelligence models. Instead of hosting a model stack themselves, customers can call models from one AWS service and keep Amazon’s security, governance, and billing controls around them. (aws.amazon.com) (aboutamazon.com) The timing followed a separate OpenAI announcement on April 27 that changed its Microsoft arrangement. OpenAI said Microsoft remains a key partner, but OpenAI is no longer bound by the prior exclusivity that centered deployment on Azure. (openai.com) (cnbc.com) Amazon and OpenAI had already been expanding ties before this launch. In February, the companies announced a multi-year partnership that included AWS infrastructure for OpenAI workloads and plans for a Stateful Runtime Environment on Bedrock. (openai.com 1) (openai.com 2) That earlier deal also described AWS as the exclusive third-party cloud distribution provider for OpenAI Frontier, a separate enterprise platform. The April 28 launch puts mainstream Bedrock access in front of AWS customers using OpenAI’s latest models and agent tools. (openai.com 1) (openai.com 2) CNBC reported the AWS rollout arrived less than 24 hours after OpenAI loosened its Microsoft ties. Reuters, cited by U.S. News, reported the move brings OpenAI’s latest models and Codex to Amazon’s cloud a day after that shift. (cnbc.com) (usnews.com) The immediate result is that companies already standardized on AWS can now buy OpenAI tools inside Amazon’s own stack instead of moving those workloads to Microsoft Azure. For OpenAI, it adds another major sales channel without asking enterprise customers to change clouds first. (aboutamazon.com) (openai.com) The launch does not end the Microsoft relationship; it redraws it. OpenAI’s models are now showing up on Amazon’s cloud one day after that reset, and AWS is using them to deepen Bedrock’s push into coding and agent software. (openai.com) (aws.amazon.com)