> However, to be able to set the reasoning effort you have to switch to the new Response API, which wasn't a lot of work, but more than just changing a URL.
That's not true - you can switch reasoning effort in the Chat Completions API - https://platform.openai.com/docs/api-reference/chat/create . It's just that in Chat Completions API it's a parameter called "reasoning_effort", while in the Responses API it's a "reasoning" parameter (object) with a parameter "effort" inside.
That's not true - you can switch reasoning effort in the Chat Completions API - https://platform.openai.com/docs/api-reference/chat/create . It's just that in Chat Completions API it's a parameter called "reasoning_effort", while in the Responses API it's a "reasoning" parameter (object) with a parameter "effort" inside.