Amazon Bedrock now supports Responses API from OpenAI

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This article announces Amazon Bedrock's support for OpenAI's Responses API on new OpenAI API-compatible service endpoints.

Enables asynchronous inference for long-running workloads
Simplifies tool use integration for agentic workflows
Supports stateful conversation management without manual history tracking
Supports both streaming and non-streaming modes
Enables reasoning effort support within Chat Completions API
Requires only base URL change for OpenAI SDK compatibility
Powered by Mantle, a new distributed inference engine
Currently available for OpenAI's GPT OSS 20B/120B models

Amazon Bedrock now provides OpenAI API-compatible endpoints with Responses API support, simplifying asynchronous inference and conversation management for developers.

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Amazon Bedrock now supports Responses API from OpenAI

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