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AWS Brings OpenAI GPT-5.5, GPT-5.4, and Codex to Amazon Bedrock

On April 28, 2026, AWS announced that OpenAI's frontier models GPT-5.5, GPT-5.4, and Codex are now available on Amazon Bedrock. Customers gain access through familiar Bedrock APIs with pricing that matches OpenAI first-party rates, no additional fees, and full enterprise security and governance controls.

Tech Insights Reporter Apr 28, 2026 5 min read Seattle

TLDR

AWS expanded its partnership with OpenAI to make the latest frontier models—GPT-5.5, GPT-5.4, and the Codex coding agent—available on Amazon Bedrock. Enterprises can now access these models via the same Bedrock services they use for other providers, with matching OpenAI pricing, no extra fees, unified security, and integration into existing AWS commitments and controls.

OpenAI Models on Amazon Bedrock

For the first time, the most advanced OpenAI models are available on Amazon Bedrock. Customers can evaluate and deploy GPT-5.5 and GPT-5.4 alongside models from Anthropic, Meta, Mistral, Cohere, and others through a single service.

Key features:

Access via Bedrock's Responses API and consistent orchestration tools.
Pricing matches OpenAI first-party rates with no additional fees.
Usage counts toward existing AWS cloud commitments.
Full enterprise controls inherited from Bedrock: IAM access management, AWS PrivateLink, guardrails, encryption, CloudTrail logging, and compliance frameworks.
Models run on Bedrock's next-generation inference engine for high performance, reliability, and security.

This allows organizations to use OpenAI models without new infrastructure or security models.

Codex on Amazon Bedrock

Codex, OpenAI's coding agent used by millions weekly for code automation, refactoring, explanation, testing, and accelerating software delivery, is now integrated with Amazon Bedrock.

Available through Bedrock API, Codex CLI, desktop app, and Visual Studio Code extension.
Inference routed through Amazon Bedrock with AWS credentials and security protections.
Usage applies to AWS commitments.

Enterprise teams can run the agent inside their existing AWS environments at scale.

Amazon Bedrock Managed Agents Powered by OpenAI

New managed agents combine OpenAI frontier models and agentic capabilities with AWS infrastructure.

Built with OpenAI agent harness for faster execution, sharper reasoning, and reliable long-running task steering.
Every agent has its own identity, full action logging for auditability, and runs inside customer environments with inference on Bedrock.
Addresses production needs: persistent memory, skills, identity/permissions, and appropriate compute.
Complements Bedrock AgentCore for broader agent building across models and frameworks.

Customers can focus on agent behavior rather than piecing together infrastructure components.

Why this story matters

This marks a significant step in bringing frontier OpenAI capabilities directly into the enterprise cloud infrastructure used by millions of organizations. By offering matching pricing, no add-on fees, and seamless integration with existing AWS security, governance, and billing, it lowers barriers for production deployment of advanced models and agents. The move expands customer choice in a multi-model world while deepening the AWS-OpenAI collaboration on agentic AI. It signals accelerating availability of top-tier AI tools through established cloud platforms with the operational maturity enterprises require.

Sources

Amazon: “OpenAI models GPT-5.5 and GPT-5.4—and Codex—now on Amazon Bedrock” (April 28, 2026). https://www.aboutamazon.com/news/aws/bedrock-openai-models
AWS announcements on Bedrock integration, Managed Agents, and expanded partnership details.
Related coverage confirming availability and pricing parity.

Featured Image Alt Text

Amazon Web Services and OpenAI logos with Bedrock interface elements and agent icons, representing the availability of GPT-5.5, GPT-5.4, and Codex on Amazon Bedrock announced April 28, 2026