OpenAI frontier models and Codex are now generally available on AWS, opening a new path for millions of AWS customers to build with OpenAI through the platform they already use to run their business. This is a significant milestone for enterprise AI adoption. For a long time, the friction wasn't about model quality. It was about getting frontier models into production environments that already had strict security, compliance, and procurement requirements baked in.
For enterprises, this removes one of the biggest barriers to AI adoption: getting frontier AI into production through existing security, compliance, procurement, billing, and governance workflows. Customers can now bring OpenAI capabilities into AWS environments with the controls their teams already trust, helping them move faster from evaluation to real deployment.
What ended on April 27, 2026 was Azure's exclusivity. Bedrock is now the second hyperscaler authorized to distribute OpenAI's frontier models. That's a structural shift in how enterprise AI gets distributed, and it's worth paying attention to.
What Is Available on Bedrock
One month after the expanded partnership announcement, GPT-5.5, GPT-5.4, and Codex are now generally available on Amazon Bedrock, giving access to frontier models and the OpenAI coding agent for software development.
The three offerings are:
- OpenAI models on Amazon Bedrock: the latest OpenAI models, available through the same Amazon Bedrock APIs and controls customers already use.
- Codex on Amazon Bedrock: OpenAI coding agent on Amazon Bedrock, for enterprise software development at scale.
- Amazon Bedrock Managed Agents, powered by OpenAI: an optimized experience for building production-ready AI agents with OpenAI frontier models on AWS.
According to OpenAI, GPT-5.5 and GPT-5.4 models are excellent for coding, reasoning, agentic workflows, and complex professional work. You can use GPT-5.5 for the hardest customer workloads and GPT-5.4 for the best price-performance.
How the Infrastructure Works
OpenAI models on Bedrock run on Amazon Bedrock's next-generation inference engine, built for high performance, reliability, and security. Access is through the Responses API, using standard Bedrock endpoints.
OpenAI models on Bedrock inherit the full set of enterprise controls customers already depend on: IAM-based access management, AWS PrivateLink connectivity, guardrails, encryption at rest and in transit, comprehensive logging through AWS CloudTrail, and integration with existing compliance frameworks. There is no additional infrastructure to configure and no new security model to learn.
