OpenAI on AWS Bedrock: The AI SaaS Provider Landscape Just Shifted

The AI provider landscape changed twice in one week. On April 28 , OpenAI ended its exclusivity arrangement with Microsoft and announced expanded availability on AWS. On May 4 , AWS made it concrete: GPT-5.5 and GPT-5.4 are now available through Amazon Bedrock in limited preview, Codex is on Bedrock as a CLI, desktop app, and VS Code extension, and a new Bedrock Managed Agents product wraps OpenAI's frontier models with AWS infrastructure for production agent workflows. That's the news cycle. He