OpenAI comes to AWS: GPT models, Codex, and Managed Agents now available within AWS environments for enterprise users

On April 28, 2026, OpenAI announced a brief but strategically significant piece of news: GPT models, Codex, and Managed Agents are now available on AWS, enabling enterprise users to build secure AI systems within their AWS environments. The announcement arrives the same day as the amended OpenAI × Microsoft partnership agreement — a timing that is hardly coincidental.

What was announced?

Three OpenAI products are coming to AWS:

• GPT models — likely the current flagship models of the OpenAI Platform
• Codex — OpenAI’s agentic coding platform
• Managed Agents — OpenAI hosted agentic runtime services

The concrete integration mechanism (via Bedrock, as a separate AWS service, or Marketplace offering), available regions, pricing, and specific model versions are not elaborated in the public announcement text. OpenAI’s “index” page returns HTTP 403 for automated retrieval, so this article strictly follows the official RSS description: “OpenAI GPT models, Codex, and Managed Agents are now available on AWS, enabling enterprises to build secure AI in their AWS environments.”

Strategic context

OpenAI previously had a hyperscaler presence exclusively through Microsoft Azure (Azure OpenAI Service). The AWS distribution is a structural change — enterprise clients who avoided Azure for organizational reasons now have the option of using OpenAI without leaving AWS. This aligns with the amended Microsoft partnership announced the same day, which contains the wording “simplifies the partnership” — clearly indicating that the exclusivity from earlier versions of the agreement has changed. A more detailed analysis of the commercial implications will follow once OpenAI publishes the full announcement text and AWS releases pricing/SLA documentation.