OpenAI 推出 GPT-5.5 Instant，幻觉减少 52.5%
openai 发布了 gpt-5.5 instant 作为新的默认 chatgpt 模型，声称在医疗和法律等高风险提示词上，幻觉比 gpt-5.3 减少 52.5%。它将标记错误对话中的不准确说法减少了 37.3%，提供更紧凑的回复，并包含新的记忆来源控制。gpt-5.3 instant 将保留三个月。
OpenAI has designated GPT-5.5 Instant as the new default model for ChatGPT, succeeding GPT-5.3 Instant. The company reports that the new model reduces hallucinated claims by 52.5% on high-stakes prompts involving medicine, law, and finance, and decreases inaccurate claims by 37.3% in conversations users previously flagged for errors. The model also features tighter responses with fewer emojis and improved context awareness from sources like Gmail.
The rollout begins immediately for all ChatGPT users, though GPT-5.3 Instant will remain accessible for three months before retirement. Enhanced personalization features and a new 'memory sources' tool—which allows users to view, delete, or correct context used in responses—are launching first for Plus and Pro users on the web, with mobile and other tier support planned.