OpenAI Codex Hits GA on AWS Bedrock, Pulls 5M Weekly Devs Into Amazon's Billing
OpenAI and AWS flipped Codex, GPT-5.5, and GPT-5.4 to general availability on Amazon Bedrock on June 1-2, with pay-per-token pricing routed through existing AWS commitments. The Codex CLI, App, and JetBrains/VS Code/Xcode integrations now run inference through Bedrock with IAM, PrivateLink, and CloudTrail wired in. It is the cleanest path yet for regulated enterprises to put OpenAI's coding agent in front of their developers without a new vendor contract.
The GA flip ends a six-week limited preview that started at the April 28 OpenAI-AWS partnership announcement. What changed is procurement, not the model: Codex still runs the same agent that more than five million developers use each week, up from four million at preview launch. The difference is that inference now flows through Bedrock endpoints, billing rolls into existing AWS commitments, and the IAM, PrivateLink, and CloudTrail controls enterprise security teams already audit apply by default. For a Fortune 500 with an AWS Enterprise Discount Program in place, that turns a months-long vendor onboarding into a Bedrock model-access toggle.
The model lineup is narrower than the marketing suggests. GPT-5.5 is only live in US East (Ohio). GPT-5.4 ships in Ohio and US West (Oregon). Console access is still "coming soon" — the only supported interface today is the Responses API. Codex itself works through the existing App, CLI, and IDE plugins for VS Code, JetBrains, and Xcode, with all calls routed to Bedrock. That last point matters: teams already standardized on Codex CLI in their developer workflow do not have to migrate tooling, just point at a new endpoint. It is a deliberately low-friction migration designed to pull users off direct OpenAI API billing without making them rewrite anything.
The competitive read is sharper than the press release lets on. Google spent I/O 2026 pushing developers off Gemini CLI and onto Antigravity 2.0 — a forced migration that broke thousands of setups overnight and lands in full on June 18 when consumer Gemini CLI access ends. Anthropic's Claude Code passed GitHub Copilot to become the most-used AI coding tool in eight months. OpenAI's answer is not a better CLI — it is making Codex the path of least resistance inside the cloud where regulated buyers already live. Bedrock customers do not have to justify a new SOC 2 review, a new DPA, or a new line item on the budget. They just turn it on.
The risk for OpenAI is margin. Pay-per-token through Bedrock means AWS takes a cut on every call, and the enterprises most likely to flip the switch are the ones who would have negotiated direct discounts anyway. The risk for AWS is heavier: Bedrock is now hosting the coding agent of its largest model-provider competitor on Anthropic, whose Claude family has been the Bedrock flagship since 2024. Amazon is betting that being the neutral substrate is worth more than being the exclusive home of any single model house. For developers, the practical takeaway is simpler — if your company already runs on AWS, the cheapest, fastest, lowest-friction way to ship Codex into production is now a Bedrock model-access request.
OpenAI: Frontier models and Codex now available on AWS → · AWS Machine Learning Blog: OpenAI models and Codex on Bedrock now GA → · Help Net Security: OpenAI brings frontier AI to existing AWS environments → · About Amazon: GPT-5.5, GPT-5.4 and Codex on Bedrock →