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 a