OpenAI DevDay 震撼发布 GPT-5 Pro、App SDK 等五件套,有哪些亮点? 在 OpenAI 官网的相关内容里,Hubspot 是这么说的: ChatKit saved us weeks of custom front-end work, making it easy for us to prototype enhancements to the UI of HubSpot’s Breeze Assistant and Agents With the custom response widget, our agents can deliver interactive, guided solutions instead of static replies