Anthropic's Mythos-class models, Claude Fable 5 and Mythos 5, just landed on Amazon Bedrock with a mandatory data-sharing condition. To call them, your prompts and completions must leave AWS's security boundary for 30-day retention and human review.
OpenAI GPT-5.5, GPT-5.4, and Codex are now generally available on Amazon Bedrock at first-party pricing, with usage drawing down existing AWS commitments. The June 1, 2026 GA ends the six-week limited preview.
AWS published a reference architecture on May 26, 2026 combining Strands Agents, NVIDIA NIM, and Amazon Bedrock AgentCore into a production-ready multi-agent system.
AWS added OpenAI-compatible API support to SageMaker AI endpoints on May 21, 2026, letting devs reuse OpenAI SDK code against custom models with a base_url swap.