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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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