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.
This report is categorized under AITOP's "Products" desk, focusing on US frontier AI labs and Silicon Valley technology leaders. Within our cross-regional analytical framework, it directly maps to AI developer toolchains, coding agents, and engineering workflows. Key entities and technical topics under continuous tracking include OpenAI, Ultrafast API, ChatGPT Pro Max, Responses API.
Source attribution: curated from TestingCatalog (@testingcatalog). Cross-source corroboration: 11 independent sources have covered this development (including IT之家, kimmonismus, Tibor Blaho), confirming industry-wide signal strength.
