OpenAI Ultrafast API 将扩大开放范围，Responses API 加入速度选择器
OpenAI 要把 Ultrafast API 开放给更多人了，Playground 会加 Fast/Standard/Ultrafast 速度选项，还有传闻的 $500 Pro Max 订阅，追速度的可以留意。
OpenAI 计划在 DevDay 之后把 Ultrafast API 开放给更多用户。Responses API Playground 将新增 Speed 选择器，提供 Fast、Standard 和 Ultrafast 三种模式。此前 Ultrafast 模型仅在 API 上面向部分合作伙伴开放。另有一份每月 500 美元的 ChatGPT Pro Max 订阅方案被曝光，主打最快响应速度。
OpenAI is preparing to expand its Ultrafast API to more users after OpenAI DevDay.
> A new Speed selector with Fast, Standard, and Ultrafast modes is coming to the Responses API Playground on the OpenAI Platform.
> Earlier, OpenAI announced the Ultrafast model on the APIs; however, it has been only available to selected partners.
> Earlier, a new $500 ChatGPT Pro Max subscription plan offering "fastest" responses was spotted. OpenAI seems to be heavily doubling down on its new infrastructure this time.
