Responses API
Explain what OpenAI’s Responses API is for: how it brings tool calling, structured outputs, files and hosted containers into one execution path, and what it means for teams migrating away from Chat Completions.
The Responses API is the interface OpenAI now promotes for agentic applications. It unified tool calling with structured outputs, then added a computer environment of files, shell and hosted containers so long-running tasks can run and replay in a controlled runtime. Connectors and Conversations removed the need to build external data and session persistence yourself. For teams leaving Chat Completions, it marks a clear shift.
