Codex Comes to Amazon Bedrock: AWS-Native Access with IAM, Billing & Enterprise Controls

Codex Lands on Amazon Web Services

On April 28, 2026, OpenAI and Amazon Web Services announced an expanded strategic partnership that brings three new offerings to Amazon Bedrock in limited preview: OpenAI frontier models, the Codex coding agent, and a new Bedrock Managed Agents service powered by OpenAI.

The announcement was made at a live AWS event in San Francisco and marks the first time enterprises can access OpenAI's coding products natively through AWS infrastructure — without routing traffic or credentials through OpenAI's own API endpoints.

Codex on Amazon Bedrock

Codex on Amazon Bedrock integrates OpenAI's coding agent directly into the AWS environments where enterprise teams already build and deploy software. Developers can authenticate using their existing AWS credentials and run inference through Bedrock, with all three Codex interfaces supported out of the box: the Codex CLI (command-line coding agent), the Codex desktop app, and the VS Code extension.

A key benefit for enterprise customers is billing consolidation: usage of both OpenAI models and Codex through Bedrock counts toward existing AWS cloud spending commitments, simplifying procurement and avoiding the need for a separate OpenAI billing relationship. Codex's codebase processing on Bedrock also carries assurances that submitted code is not included in future model training.

OpenAI Frontier Models on Bedrock

For the first time, AWS customers can access OpenAI's frontier models — including GPT-5.5 and GPT-5.4 — through the same Bedrock services they already use for model access, fine-tuning, and orchestration. These models inherit Bedrock's enterprise-grade controls, including IAM policies, AWS PrivateLink, guardrails, encryption, and CloudTrail logging.

GPT-5.4 is available now in limited preview, with GPT-5.5 following within weeks. A practical implication for regulated industries (healthcare, finance, government) is that organizations with existing AWS data residency requirements can now access OpenAI's latest models without negotiating a separate Data Processing Agreement with OpenAI directly.

Bedrock Managed Agents Powered by OpenAI

A third offering, Amazon Bedrock Managed Agents powered by OpenAI, provides a streamlined path to deploying production-ready AI agents on AWS. These agents combine OpenAI's frontier models and agent harness with Bedrock's AgentCore platform, offering prepackaged tools for code execution, web access, and external tool integration — without requiring teams to build their own data management or orchestration infrastructure from scratch. The service is designed to handle multi-step workflows that maintain context and take action across complex business processes.

Strategic Context

The announcement arrived one day after OpenAI and Microsoft publicly renegotiated their partnership terms. Under the revised agreement, OpenAI gained the ability to place a ceiling on revenue-share obligations with Microsoft and to offer its services through competing cloud platforms — effectively ending Azure's de facto exclusivity on OpenAI products.

Codex now reaches more than 4 million weekly active users. The move to Bedrock addresses a common barrier cited by enterprise buyers: many organizations have multi-year AWS commitments, strict data-sovereignty policies, and security workflows built around AWS IAM, making it operationally difficult to adopt OpenAI products that require direct API access. By running through Bedrock, those teams can adopt Codex with fewer procurement and compliance hurdles.

All three offerings are currently in limited preview, with general availability expected in the coming weeks.