OpenAI Brings GPT-5.5, Codex, and Managed Agents to AWS Bedrock in Limited Preview
OpenAI and AWS announced an expanded strategic partnership on April 28, making OpenAI’s full product stack available through Amazon Bedrock for the first time. Three products enter limited preview simultaneously: OpenAI models on AWS, Codex on AWS, and Amazon Bedrock Managed Agents powered by OpenAI.
The move is the first concrete consequence of OpenAI’s decision to end its Microsoft exclusivity arrangement. Any company with an existing AWS commit and Bedrock access can now build with OpenAI models inside the security, compliance, and procurement frameworks they already operate in, without routing traffic through Azure.
What’s Shipping
OpenAI models on AWS puts GPT-5.5 and other frontier models directly on Amazon Bedrock. Enterprise customers can call OpenAI APIs through the same identity systems, VPCs, and procurement workflows used for the rest of their AWS stack. The path from experimentation to production runs through a single cloud account.
Codex on AWS brings OpenAI’s software engineering agent to AWS environments. More than 4 million people use Codex weekly. Enterprises have been asking for a version that operates inside their own security perimeter rather than calling out to OpenAI’s infrastructure. This is that version.
Amazon Bedrock Managed Agents powered by OpenAI is a new product jointly developed with AWS. It lets enterprises deploy structured AI agent workflows within their Bedrock environment, with OpenAI providing the model layer and AWS providing the orchestration, governance, and audit infrastructure.
Why It Matters
OpenAI’s distribution was, until recently, effectively synonymous with Microsoft. Azure was the only enterprise cloud where OpenAI ran natively. Ending that exclusivity opened the door in principle; this launch demonstrates it in practice.
AWS has the largest enterprise cloud installed base. The Bedrock partnership gives OpenAI access to companies that have committed billions to AWS and are reluctant to spin up Azure infrastructure just to access frontier models. Conversely, it gives AWS a credible answer to the argument that Azure has a structural AI edge.
The “managed agents” product is the more interesting piece. It is not simply model access: it is a joint agent platform where OpenAI handles reasoning and AWS handles the deployment, compliance, and enterprise integration. That positioning competes directly with Amazon’s own Bedrock Agents product, which now has OpenAI as both a component and a beneficiary.
All three products launched April 28 in limited preview, with broader availability expected in the coming weeks.