Amazon Web Services Inc. today made OpenAI Group PBC’s large language models available on its cloud platform.

The algorithms are accessible through Amazon Bedrock alongside Codex, the ChatGPT developer’s programming assistant. In addition, AWS is rolling out a new offering called Bedrock Managed Agents. It’s designed to ease the task of building OpenAI-powered AI agents.

“This is as easy as a click of a button now to build with access to models, to the API and Codex, and I think this just unlocks speed and scale” to put OpenAI models into operation on AWS, OpenAI Chief Revenue Officer Denise Dresser said at a gathering of press and analysts today in San Francisco.

AWS Chief Executive Matt Garman added that now its customers aren’t limited to using models from Amazon and Anthropic if they want to use OpenAI’s. “We don’t have to force people to make that choice,” he said.

The introduction of the product integrations is not unexpected. On Monday, OpenAI revised its partnership agreement with Microsoft Corp., which was previously the only company that could offer the ChatGPT developer’s models via its cloud. The updated contract enables competing cloud providers to distribute OpenAI models.

That AWS is the first Microsoft rival to join the fray is not too surprising. This past February, Amazon.com Inc. invested $15 billion in OpenAI and announced plans to provide the company with an additional $35 billion within a few months. The online retail giant is also a major stakeholder in Anthropic PBC.

OpenAI’s latest AI models are available to Bedrock users in limited preview. The newest algorithm in the lineup, GPT-5.5, made its debut last week. OpenAI says that the LLM can perform tasks such as optimizing the performance of graphics card clusters and developing mathematical proofs. It outperforms Claude Opus 4.7, Anthropic’s most advanced broadly available model, across several benchmarks.

Bedrock also provides access to Codex via its application programming interface. Customers can use the Codex desktop app, an extension that embeds the AI into the popular Visual Studio Code programming tool and the Codex CLI. The latter offering is a coding agent that developers can access via the command line.

Like OpenAI’s LLMs, the Bedrock version of Codex is available in limited preview. Usage of both offerings counts towards AWS spending commitments, which will simplify procurement for the cloud giant’s enterprise customers. Developers, meanwhile, can use their existing AWS credentials to access OpenAI’s technologies.

The LLM and Codex integrations are rolling out alongside Bedrock Managed Agents. It’s an offering that speeds up the process of developing AWS-hosted AI agents powered by OpenAI models.

The new service combines the LLMs with the OpenAI agent harness, a set of software modules that improve agents’ ability to perform long-running tasks. AWS says the toolkit also speeds up prompt response times and facilitates “sharper reasoning.”

Bedrock Managed Agents uses the OpenAI agent harness together with another collection of re-packaged software modules called Bedrock AgentCore. According to AWS, the latter toolkit helps agents manage the information they use to complete tasks. That removes the need for developers to build data management scaffolding from scratch. 

AgentCore also eases several related tasks. It includes prepackaged tools that enable agents to run the code they write, access the web and perform other actions. There’s also a gateway that eases the process of giving agents access to external tools.

Bedrock Managed Agents is available in limited preview.

With reporting from Robert Hof

Photo: Tony Webster/Flickr