QUICK ANSWER
GPT-5.5, GPT-5.4, and Codex are now generally available on Amazon Bedrock as of June 1-2, 2026. Pricing matches OpenAI direct rates — no additional fees. Usage counts toward existing AWS commitments. GPT-5.5 is in US East (Ohio) only; GPT-5.4 is in US East (Ohio) and US West (Oregon). Codex runs via CLI, desktop app, and VS Code/JetBrains/Xcode integrations, with all inference routed through Bedrock. Amazon Bedrock Managed Agents and Daybreak on Bedrock are confirmed as next releases in the partnership roadmap.
How the OpenAI-AWS Partnership Got Here
OpenAI and AWS announced their expanded partnership on April 28, 2026 - the deal that formally ended OpenAI's exclusive cloud arrangement with Microsoft. For the first time, AWS customers could access OpenAI frontier models through Amazon Bedrock's existing APIs and governance controls. The April 28 launch was limited preview only. General availability arrived on June 1-2, moving from evaluation to production access for all AWS customers.
The Microsoft angle matters here. Microsoft's original partnership with OpenAI included terms requiring OpenAI models to be accessed through Azure. The OpenAI-AWS deal - and AWS VP Swami Sivasubramanian confirming that GPT-5.5 is now "available natively on Amazon Bedrock" - represents a direct restructuring of those exclusivity terms. Microsoft confirmed at Build 2026 that it is aware of the arrangement; the April 2026 partnership restructuring between Microsoft and OpenAI explicitly carved out a path for multi-cloud availability.
What Is Available and Where
| Model / Product |
AWS Regions |
API |
GovCloud |
| GPT-5.5 |
US East (Ohio) only |
Responses API |
Yes |
| GPT-5.4 |
US East (Ohio) + US West (Oregon) |
Responses API |
Yes |
| Codex |
Commercial + GovCloud |
Codex App, CLI, IDE integrations |
Yes |
GPT-5.5 is OpenAI's most advanced frontier model - the one described by OpenAI as suited for demanding, complex workloads where maximum capability matters more than cost. GPT-5.4 is positioned as the best price-performance option - capable enough for most enterprise use cases at lower per-token cost. Both run on Bedrock's next-generation inference engine with high performance, reliability, and the security posture enterprises already use on AWS: IAM, AWS PrivateLink, guardrails, encryption, and CloudTrail logging.
Codex on Bedrock is accessed through the standard Codex App, CLI, and IDE integrations - VS Code, JetBrains, and Xcode. Developers authenticate with AWS credentials and all inference routes through Bedrock infrastructure. This means Codex sessions inherit the same IAM controls, VPC isolation, and encryption that protect all other Bedrock workloads. For enterprise teams that have already gone through security review for Bedrock, Codex is now available without a separate review process.
Pricing - Identical to OpenAI Direct, Usage Counts Toward AWS Commitments
Pricing on Amazon Bedrock matches OpenAI's first-party rates exactly - there is no AWS premium. GPT-5.5 and GPT-5.4 token rates on Bedrock are the same as calling api.openai.com directly. Codex pricing is also identical to the direct OpenAI pricing. The practical difference: usage counts toward existing AWS committed spend. For enterprises that have signed AWS Enterprise Discount Program (EDP) agreements, OpenAI model usage on Bedrock now counts toward those commitments - meaning it reduces the incremental cost relative to paying OpenAI directly out of a separate budget.
This is a meaningful procurement advantage for large AWS customers. A company with a $50M annual AWS EDP commitment can now consume OpenAI API capacity within that commitment rather than writing a separate check to OpenAI. For finance and procurement teams evaluating AI spend consolidation, this changes the effective cost of using OpenAI models materially.
What Is Coming Next in the Partnership
Two major additions to the OpenAI-AWS partnership are confirmed but not yet available:
Amazon Bedrock Managed Agents (powered by OpenAI)
Will let developers build production-scale autonomous agentic solutions using OpenAI's agent harness natively within Bedrock. This brings the same Managed Agents capability Anthropic offers on Bedrock to OpenAI models - allowing enterprises to build multi-step, tool-calling agents without managing their own orchestration layer.
Daybreak on Amazon Bedrock
OpenAI's cybersecurity initiative - which combines GPT-5.5 and Codex Security to scan codebases for vulnerabilities - will be available natively on Bedrock infrastructure. This means enterprise security teams with existing AWS security tooling (GuardDuty, Security Hub, Inspector) will be able to integrate Daybreak scans within the same governance environment. No timeline given beyond "coming."
Frequently Asked Questions
Is there a difference between OpenAI on Azure and OpenAI on Bedrock?
The models are the same. The difference is the cloud infrastructure and governance layer they run on. Azure OpenAI Service gives you Azure-native IAM, Azure Private Link, Azure Monitor, and Microsoft's compliance posture. Amazon Bedrock gives you AWS IAM, VPC isolation, CloudTrail, AWS PrivateLink, and Amazon's compliance posture. Teams already operating primarily on AWS will find Bedrock significantly easier to integrate; teams primarily on Azure will find Azure OpenAI easier. Both are now available options for accessing the same GPT-5.5 and GPT-5.4 models.
Why is GPT-5.5 only in US East (Ohio) and not more regions?
Regional availability for frontier models on Bedrock typically rolls out from US East first due to infrastructure constraints. AWS expands region availability as capacity is provisioned - GPT-5.4 is already in two regions. Expect GPT-5.5 to expand to additional regions over the coming months. For teams with data residency requirements outside Ohio, GPT-5.4 in Oregon may be the interim option.
Does OpenAI on Bedrock violate Microsoft's exclusivity agreement?
Microsoft and OpenAI restructured their partnership in April 2026, and multi-cloud availability was explicitly part of that restructuring. Earlier reporting that Microsoft might pursue legal action over OpenAI's AWS deal was resolved through the April renegotiation. The Build 2026 keynote - where Microsoft shipped Project Polaris and reduced its own Copilot dependency on OpenAI - reflects a more arms-length relationship, but both parties have confirmed the partnership remains active for Azure OpenAI Service and other products.
How does this affect Anthropic's position on Bedrock?
Anthropic is still Amazon's primary AI partner - Amazon has invested $8 billion in Anthropic and Claude models are deeply integrated into Bedrock. OpenAI on Bedrock is additive, not a replacement. Enterprises can now access both Claude (via Bedrock as the preferred Anthropic cloud) and OpenAI models (via the new Bedrock integration) through the same Bedrock console. Bedrock becomes a multi-provider AI model marketplace, which benefits AWS more than it hurts any single model provider.