<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[OpenAI 将 ChatGPT 默认模型升至 GPT-5.5 Instant，幻觉率下降 52.5%]]></title><description><![CDATA[<p dir="auto">OpenAI 于 5 月 5 日发布公告，将 ChatGPT 所有用户的默认模型从 GPT-5.3 Instant 升级至 GPT-5.5 Instant。官方称，内部评估显示新模型在医疗、法律、金融等高风险提示场景中的幻觉率较前代下降 52.5%，在用户标记的高难度对话中错误陈述减少 37.3%。基准测试方面，GPT-5.5 Instant 在 AIME 2025 数学测试中得分 81.2（前代为 65.4），在 MMMU-Pro 多模态推理榜单上得分 76（前代为 69.2）。此外，新模型刻意压缩了响应篇幅，并减少了被 OpenAI 称为&quot;无谓 emoji&quot;的过度格式化输出。</p>
<p dir="auto">此次更新还引入了更深度的个性化功能：GPT-5.5 Instant 可调用用户的历史对话、已上传文件及关联的 Gmail 账户作为回答上下文，并通过新增的&quot;记忆来源&quot;控件向用户展示具体引用了哪些信息，用户可随时删除或修正，也可切换至&quot;临时对话&quot;模式彻底关闭记忆。该个性化功能目前仅向 Plus 和 Pro 用户的网页端开放，移动端及 Free、Business、Enterprise 等层级将在未来数周内跟进。对开发者而言，GPT-5.5 Instant 已通过 API 以 <code>chat-latest</code> 标识符提供；GPT-5.3 Instant 将对付费用户保留三个月后正式退役。</p>
<p dir="auto"><a href="https://openai.com/index/gpt-5-5-instant/" target="_blank" rel="noopener noreferrer nofollow ugc">OpenAI</a> | <a href="https://techcrunch.com/2026/05/05/openai-releases-gpt-5-5-instant-a-new-default-model-for-chatgpt/" target="_blank" rel="noopener noreferrer nofollow ugc">TechCrunch</a> | <a href="https://9to5mac.com/2026/05/05/gpt-5-5-instant-makes-chatgpt-more-accurate-while-nixing-gratuitous-emojis/" target="_blank" rel="noopener noreferrer nofollow ugc">9to5Mac</a></p>
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OpenAI releases GPT-5.5 Instant, a new default model for ChatGPT | TechCrunch
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<p class="card-text line-clamp-3">The company said the model reduces hallucination in sensitive areas such as law, medicine, and finance, while maintaining the low latency of its predecessor.</p>
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OpenAI releases GPT-5.5 Instant update to make ChatGPT smarter with fewer emoji - 9to5Mac
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<p class="card-text line-clamp-3">ChatGPT should feel “smarter and more accurate” starting today, according to OpenAI. That’s because the company is replacing the default...</p>
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]]></description><link>https://welinux.com//topic/191/openai-将-chatgpt-默认模型升至-gpt-5.5-instant-幻觉率下降-52.5</link><generator>RSS for Node</generator><lastBuildDate>Mon, 18 May 2026 17:54:48 GMT</lastBuildDate><atom:link href="https://welinux.com//topic/191.rss" rel="self" type="application/rss+xml"/><pubDate>Wed, 06 May 2026 01:25:39 GMT</pubDate><ttl>60</ttl></channel></rss>