GPT-5.5, GPT-5.4, and Codex land on Amazon Bedrock with Managed Agents in preview

AWS expanded its OpenAI partnership, bringing GPT-5.5 and GPT-5.4 to Amazon Bedrock in limited preview alongside Bedrock Managed Agents powered by OpenAI for production agentic deployments. Codex is also coming to Bedrock with OpenAI's harness integrated for faster execution and reasoning.