I found a broken link on https://developers.openai.com/api/docs/guides/migrate-to-responses
[Broken link text]
In Chat Completions, conversation state must be managed manually. The Responses API has compatibility with the Conversations API for persistent conversations, or the ability to pass a previous_response_id to easily chain Responses together.
[Broken URL] (404 Page not found)
https://developers.openai.com/api/docs/guides/docs/guides/conversation-state?api-mode=responses#using-the-conversations-api
Also, I found typo:
The objects you recieve back from these APIs will differ slightly. In Chat Completions, you receive an array of choices, each containing a message. In Responses, you receive an array of Items labled output.