THE WHOLE POINT OF OPENAI'S RESPONSES API IS TO HELP THEM HIDE REASONING TRACES

Summary from the TLDR AI newsletter

OpenAI's Responses API replaces the previous /chat/completions API for inference. The new API has a lot more features, but the main difference is that it is stateful. Users no longer have to pass the entire conversation history with each request, they just have to pass an ID representing the state of the conversation and the provider keeps models up to date. This allows OpenAI to keep its reasoning traces secret.