OpenAI发布GPT-5.3 Instant,高风险场景幻觉率降低约27%,默认替代5.2 Instant

据 1M AI News 监测,OpenAI 发布 GPT-5.3 Instant,替代 GPT-5.2 Instant 成为 ChatGPT 默认模型。此次更新聚焦日常对话体验,主要改进三个方面:减少不必要的拒绝和说教式前言,改善联网搜索答案的整合质量,以及降低幻觉率。

据 OpenAI 内部评测,在医学、法律、金融等高风险场景中,联网时幻觉率较前代降低 26.8%,仅依赖内部知识时降低 19.7%;在用户反馈的典型易错对话中,联网时降低 22.5%,无联网时降低 9.6%。OpenAI 表示 GPT-5.2 Instant 的语气有时「令人尴尬」(cringe),会做出对用户意图的不当假设或发表不必要的声明,5.3 版本对此进行了针对性调整。

该模型即日起面向所有 ChatGPT 用户开放,API 端以 gpt-5.3-chat-latest 提供。GPT-5.2 Instant 将在付费用户的旧版模型列表中保留至 6 月 3 日后退役。

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