Switch to Responses API for OpenAI #325
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Some model (incl. `o4-mini-deep-research`) aren't compatible with the chat/completion API. This PR introduces a new `Response` class, which - similarly to `Chat` (and inheriting from the same base `Conversation` class) - allows a user to target the `responses` endpoint.
tpaulshippy
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Aug 6, 2025
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Being fully transparent - claude-4-sonnet handled most of the changes to this file in particular. Deserves some extra 👀.
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What this does
As explained here there are numerous reasons to use the newer Responses API instead of the Chat Completions API. Features we get by switching include:
o4-mini-deep-researchThere is one feature lost - audio inputs are not supported by the Responses API. So, the library will detect any audio inputs and fall back to the Chat Completions API if they exist.
Type of change
Scope check
Quality check
overcommit --installand all hooks passmodels.json,aliases.json)API changes
Related issues
Replaces #290
Should enable resolution of #213