OpenAI 將 GPT-5.5 Instant 設為 ChatGPT 預設模型
openai 發布了 gpt-5.5 instant，取代 gpt-5.3 instant 成為預設 chatgpt 模型。新模型在 aime 2025 數學測試中得分 81.2，高於之前的 65.4，並強調減少法律、醫學和金融領域的幻覺。允許引用來源和編輯的上下文管理功能現已向 plus 和 pro 用戶推出。
OpenAI released GPT-5.5 Instant, replacing GPT-5.3 Instant as the default ChatGPT model. The new model improves performance on the AIME 2025 math benchmark to 81.2 (up from 65.4) and the MMMU-Pro multimodal benchmark to 76.0 (up from 69.2). The release focuses on reducing hallucinations in sensitive sectors like law and medicine while maintaining low latency. The model introduces context management features, allowing it to reference past conversations, Gmail, and files to provide personalized answers. This citation feature is available immediately to Plus and Pro web users, with mobile and enterprise access planned for the coming weeks. Developers can access the model via the API as 'chat-latest', while the API for GPT-5.3 will remain available for paid users for three months.