GPT-5.5 Instant 系统卡片

GPT-5.5 Instant System Card

AI 导读

OpenAI 于2026年5月5日发布了最新即时模型 GPT-5.5 Instant。该模型在网络安全、生物与化学防范两个类别首次被定位为“高能力”级别，并为此实施了相应的安全防护措施。其整体安全缓解方案与此系列前代模型相似。官方明确，不存在名为 GPT-5.4 Instant 的模型，其主要对标基线是 GPT-5.3 Instant。为避免混淆，GPT-5.5 模型被特指为 GPT-5.5 Thinking。

推荐理由

GPT-5.5 Instant 是第一个被 OpenAI 标记为「高能力」的 Instant 模型，安全评估里多了些新门槛，做 AI 安全的可以翻开系统卡看看具体红线画在哪。

正文

Introduction

GPT‑5.5 Instant is our latest Instant model, and explained in our blog⁠. The comprehensive safety mitigation approach for this model is similar to previous models in this series, but this is the first Instant model that we are treating as High capability in our Cybersecurity and Biological & Chemical Preparedness categories, and implementing appropriate safeguards.

In this card we also refer to GPT‑5.5 Instant as gpt-5.5-instant. Note that there is not a model named GPT‑5.4 Instant, and the main model to baseline against is GPT‑5.3 Instant. Additionally, we refer to GPT‑5.5⁠ as GPT‑5.5 Thinking to avoid confusion with the instant model.