[Feature] Support for OpenAI responses endpoint

[itspolly]

Problem Description No support for OpenAI responses endpoint which means you cannot use GPT-5 Pro in this app.

Proposed Solution

• Add support for the OpenAI responses endpoint so that GPT-5 Pro can be used in your app.

Additional Context

See https://platform.openai.com/docs/api-reference/responses for details.

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问题描述 请描述您遇到的问题或难题，以及为什么这使得使用软件变得困难或令人沮丧。

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[VincentHXZ]

I can't set the OpenAI API path to v1/responses, even with a custom provider — it must be v1/chat/completions.

[ploz85]

Any news about this? You can't use gpt-5-codex neither without /responses support.