Amazon adds OpenAI models to Bedrock for AWS users

Amazon has made OpenAI's GPT-5.5, GPT-5.4 and Codex generally available on Amazon Bedrock, expanding access to OpenAI models through its cloud AI service.

The models are listed in the Bedrock model catalogue and can be used in production applications and AI agents. Pricing for GPT-5.5 and GPT-5.4 matches OpenAI's direct per-token rates, while Codex is offered on a pay-per-token basis.

The launch follows an expanded partnership between Amazon Web Services and OpenAI. It gives AWS customers another way to use OpenAI's latest models within existing AWS environments, with usage counting towards existing AWS commitments.

Amazon described GPT-5.5 as the most advanced OpenAI model offered on Bedrock. GPT-5.5 and GPT-5.4 are designed for complex, multi-step work, including coding, data analysis, document creation and software operations across multiple tools.

Customers can access the models through the Responses API on Amazon Bedrock. Inference runs through Bedrock's own infrastructure, with isolated queues and automated capacity management intended to keep performance stable during periods of heavy demand.

Requests are also durably captured during processing, allowing tasks to resume if hardware fails or a node restarts mid-call. AWS governance controls, including IAM permissions, VPC and PrivateLink isolation, KMS encryption and AWS CloudTrail audit logging, also apply to the OpenAI models on Bedrock.

Prompts and responses are not used to train models and are not shared with model providers. That assurance is likely to matter for large companies in regulated sectors that want to use external AI models while keeping tighter control over data handling and auditability.

Codex access

Alongside the language models, Amazon has also made Codex generally available on Bedrock. OpenAI's coding agent is aimed at software development tasks such as writing, refactoring, debugging, testing and validating code across large codebases.

Amazon said more than 5 million people use Codex each week. On Bedrock, the service is available through the Codex App, the Codex command-line interface and integrated development environments including Visual Studio Code, JetBrains and Xcode.

All model inference for Codex on Bedrock is routed through Amazon Bedrock. Inference remains within a customer's selected region, which can help meet data residency requirements.

Amazon is positioning the launch as part of a broader effort to make Bedrock a central marketplace and operating layer for third-party and proprietary AI models. For customers, the appeal lies in using a single governance and billing framework across multiple model providers rather than managing separate commercial and technical relationships.

The announcement also highlights growing competition among cloud providers to host leading AI models from external developers. By offering OpenAI's latest systems inside Bedrock, Amazon strengthens its position against rivals also seeking to become the default route for businesses deploying generative AI tools.

One customer cited by Amazon was Amgen, which pointed to the relevance of stronger model quality and consistency for scientific work.

"At Amgen, we're focused on applying advanced AI in ways that may help accelerate the delivery of potential new therapies while equipping our teams with advanced tools. OpenAI's GPT-5.5 and frontier models offer compelling advances in capability, quality and consistency that matter in a field where the questions are complex and the standards for scientific accuracy and decision quality are exceptionally high. Making these models available on AWS gives us an important new path to explore and scale those capabilities within the responsible AI framework, including security, governance and operational frameworks across the enterprise," said Sean Bruich, Senior Vice President and Chief Technology Officer at Amgen.

Another customer, Autodesk, said it is assessing how the models and coding tools could be used in development workflows and decision-making.

"Autodesk is the technology platform for the people who design and make the world around us. Workflows like building design are highly iterative, requiring precision, coordination and continuous refinement across teams. With OpenAI models and Codex now generally available on Amazon Bedrock, our teams are evaluating how frontier AI capabilities and AI-powered development tools on scalable, secure AWS infrastructure can help accelerate development workflows and support more informed decision-making for our customers," said Ritesh Bansal, Vice President of Analytics Data, Agentic AI and AI/ML Platform at Autodesk.

The release underlines how quickly major cloud providers are moving to make generative AI access a standard part of their infrastructure offerings, particularly for companies that want commercial flexibility, centralised governance and the option to run advanced models without leaving their existing cloud estate.

Codex on Bedrock is offered with no seat licences or per-developer commitments, with charges based on token usage.