OpenAI 将 GPT-5.5 Instant 设为 ChatGPT 默认模型
openai 发布了 gpt-5.5 instant，取代 gpt-5.3 instant 成为默认 chatgpt 模型。新模型在 aime 2025 数学测试中得分 81.2，高于之前的 65.4，并强调减少法律、医学和金融领域的幻觉。允许引用来源和编辑的上下文管理功能现已向 plus 和 pro 用户推出。
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.