OpenAI's frontier models and Codex are now generally available on AWS, the companies announced on June 2, 2026, giving enterprises a new path to build with OpenAI through the Amazon environments, controls, and procurement workflows they already rely on.
GPT-5.5, GPT-5.4, and Codex are now generally available on Amazon Bedrock. OpenAI positions GPT-5.5 for the hardest customer workloads and GPT-5.4 for the best price-performance, with both models strong at coding, reasoning, and agentic workflows. At launch, GPT-5.5 is available in the US East (Ohio) region and GPT-5.4 in US East (Ohio) and US West (Oregon).
A central selling point is integration with existing enterprise controls. All inference is routed through Amazon Bedrock with the same protections customers already use on AWS, including IAM, VPC isolation, and encryption. Pricing matches OpenAI's first-party rates, and usage counts toward AWS commitments, removing common procurement and billing hurdles. Codex is available through the Codex app, CLI, and IDE integrations.
The move addresses one of the biggest barriers to enterprise AI adoption: getting frontier models into production within the security, compliance, procurement, and governance frameworks organizations have already standardized on. By meeting customers inside AWS rather than asking them to adopt a separate stack, OpenAI broadens its reach into regulated and large-enterprise segments where Bedrock is already entrenched.
The companies framed the launch as the beginning of a broader expansion. Future availability is expected to include Daybreak, OpenAI's initiative spanning cyber models and Codex Security, aimed at helping defenders see risk earlier and make software more resilient by design.
For AWS, the partnership strengthens Bedrock's model marketplace at a time when enterprises increasingly want multiple frontier models behind a single, governed interface. For OpenAI, it extends distribution well beyond its first-party API and Azure relationship, signaling a more platform-agnostic commercial strategy.
Source: [OpenAI](https://openai.com/index/openai-frontier-models-and-codex-are-now-available-on-aws/)