OpenAI's GPT-5.5 System Card was updated in an update detected on August 20, 2026. The change involved removing references to three previously listed company and product announcements (Expanding Daybreak as the Cyber Defense Window Narrows, Pacing model development in an era of cyber-critical capabilities, and Introducing ChatGPT for Teens) and adding a new announcement link titled 'Offering Zero Data Retention for frontier models' dated August 19, 2026. This is an editorial change to the card's navigation and related-content section, reflecting current publication links rather than a change to the substantive safeguards or deployment terms described in the system card itself.
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This card was updated on April 24, 2026, to include additional information about safeguards for the deployment of GPT‑5.5 and GPT‑5.5 Pro in the API. 2026 System Cards Author OpenAI Keep reading View all Pacing model development in an era of cyber-critical capabilities Company Aug 18, 2026 Introducing ChatGPT for Teens Product Aug 18, 2026 Expanding Daybreak as the Cyber Defense Window Narrows Security Aug 10, 2026
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This card was updated on April 24, 2026, to include additional information about safeguards for the deployment of GPT‑5.5 and GPT‑5.5 Pro in the API. 2026 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, 2026
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