File Search on Responses API

API
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Hello, reading through the new Responses API and I was wondering if anyone knows if we need to send history to it to keep the context, or if it has similar Thread-like functions like Assistant API.

We use the Chat Completions API and have started implementing Assistant API so that 1) we dont need to send history each time and 2) users can upload files to our app.
It would be cool to migrate to Responses as quick as possible as OpenAI says its much more faster.

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https://platform.openai.com/docs/guides/conversation-state?api-mode=responses

When creating a “response” , you can use previous_response_id to refer to the previous response object (and subsequently all the other ones in the conversation) …

So you don’t have to send the history each time. However “responses” objects are stored online for only 30 days.

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