OpenAI · 2026-06-01 · major
OpenAI Frontier Models and Codex Hit GA on Amazon Bedrock — GPT-5.5 in US East (Ohio), GPT-5.4 in Ohio and Oregon, Codex CLI Through Bedrock API Keys With Pay-Per-Token and No Seat Licenses
AWS made OpenAI's GPT-5.5 and GPT-5.4 generally available on Amazon Bedrock, with Codex callable through Bedrock API keys via the OpenAI SDK, the AWS SDK credential chain, and Codex CLI / VS Code / JetBrains / Xcode plugins.
GPT-5.5, GPT-5.4, and Codex are now generally available on Amazon Bedrock under AWS billing, IAM, and data-residency.
Key specs
| Active codex developers per week | 4M+ |
|---|---|
| Gpt 5.5 region | US East (Ohio) |
| Gpt 5.4 regions | US East (Ohio), US West (Oregon) |
What is it?
AWS Bedrock is Amazon's managed foundation-model platform, and as of today it ships OpenAI's frontier models alongside Anthropic, Cohere, Meta, and Mistral. GPT-5.5 is OpenAI's flagship for the hardest reasoning, coding, and agentic workloads; GPT-5.4 targets best price-performance for the same surface. Codex, OpenAI's coding agent, is also on Bedrock with full IDE plugin support.
How does it work?
Customers call the models through the OpenAI SDK and Responses API pointed at bedrock-mantle endpoints, or through the AWS SDK using the standard credential chain. Bedrock fronts the inference with its existing security, compliance, procurement, and billing surface. Codex on Bedrock ships CLI, desktop, and IDE plugins for VS Code, JetBrains, and Xcode. Authentication works either via Amazon Bedrock API keys or AWS SDK credentials. GPT-5.5 supports reasoning effort levels (medium/low). Console support is coming soon.
Why does it matter?
OpenAI's frontier API has lived on Azure plus openai.com; landing on Bedrock removes the single biggest enterprise procurement barrier for the millions of AWS customers who already have AWS billing, IAM, and data-residency contracts. It also marks the first time GPT-5-class models ship on a non-Microsoft hyperscaler — the partnership rewrite from May made this possible.
Who is it for?
Enterprise developers, AWS-native shops, platform teams evaluating multi-model strategies
Try it
Add bedrock-mantle endpoint to your OpenAI SDK config and pass an Amazon Bedrock API key