OpenAI 推出 GPT-5.5 Instant，幻覺減少 52.5%
openai 發布了 gpt-5.5 instant 作為新的預設 chatgpt 模型，聲稱在醫療和法律等高風險提示詞上，幻覺比 gpt-5.3 減少 52.5%。它將標記錯誤對話中的不準確說法減少了 37.3%，提供更緊湊的回覆，並包含新的記憶來源控制。gpt-5.3 instant 將保留三個月。
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.