Old version
August 21, 2026 00:09 UTC
4e5add46dc5273807f23732522b2411d03a42fb10e9fae9ea9abfcea476fc65c
CA-V-005962
New version
August 27, 2026 00:09 UTC
8b6e7083a2035fe8c8bd064b91d6297526b6f0abbb63950a86d0f69af860d484
CA-V-006103
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Change Summary
OpenAI's GPT-5 System Card was revised in an update detected on August 27, 2026. The change involved reformatting the document header and updating the related articles section. Specifically, the 'Pacing model development' and 'Offering Zero Data Retention' articles remain, but a new linked article titled 'The Hugging Face incident and the road ahead' (dated August 26, 2026) was added to the related content section.
low severity
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0OpenAI August 7, 2025 Publication Safety GPT‑5 System Card Read the System Card (opens in a new window) Dive into the data (opens in a new window) Share GPT‑5 is a unified system with a smart and fast model that answers most questions, a deeper reasoning model for harder problems, and a real-time router that quickly decides which model to use based on conversation type, complexity, tool needs, and explicit intent (for example, if you say “think hard about this” in the prompt).0GPT-5 System Card | OpenAI August 7, 2025 Publication Safety GPT‑5 System Card Read the System Card (opens in a new window) Dive into the data (opens in a new window) Share GPT‑5 is a unified system with a smart and fast model that answers most questions, a deeper reasoning model for harder problems, and a real-time router that quickly decides which model to use based on conversation type, complexity, tool needs, and explicit intent (for example, if you say “think hard about this” in the prompt).
12While we do not have definitive evidence that this model could meaningfully help a novice to create severe biological harm—our defined threshold ⁠ (opens in a new window) for High capability—we have chosen to take a precautionary approach. 2025 System Cards Author OpenAI Keep reading View all Offering Zero Data Retention for frontier models Company Aug 19, 2026 Pacing model development in an era of cyber-critical capabilities Company Aug 18, 2026 Introducing ChatGPT for Teens Product Aug 18, 202612While we do not have definitive evidence that this model could meaningfully help a novice to create severe biological harm—our defined threshold ⁠ (opens in a new window) for High capability—we have chosen to take a precautionary approach. 2025 System Cards Author OpenAI Keep reading View all Your browser does not support the video tag.
13The Hugging Face incident and the road ahead Security Aug 26, 2026 Offering Zero Data Retention for frontier models Company Aug 19, 2026 Pacing model development in an era of cyber-critical capabilities Company Aug 18, 2026
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