Introducing the Stateful Runtime Environment for Agents in Amazon Bedrock

Source: OpenAI Date: 2026-02-27 URL: https://openai.com/index/introducing-the-stateful-runtime-environment-for-agents-in-amazon-bedrock

Summary

Joint announcement from OpenAI and Amazon Web Services introducing a Stateful Runtime Environment for agents running on Amazon Bedrock — enabling agents to maintain session state, tool call history, and intermediate results across turns without the developer manually managing context. Likely built on the Responses API and OpenAI’s agent infrastructure, surfaced through the Bedrock interface.

Implications

Agentic engineering thread. Stateful agent runtimes are the infrastructure layer that makes long-horizon agentic tasks reliable: without managed state, agents either stuff everything into context (expensive, lossy) or lose thread across multi-step tasks. OpenAI/AWS co-launching this through Bedrock is significant — it means enterprise developers can access OpenAI’s agent runtime without leaving AWS’s infrastructure. This deepens the AWS-OpenAI relationship (post the joint statement in February 2026) and competes directly with Anthropic’s Bedrock agent capabilities.