OpenAI's GPT-5.5 System Card title was reformatted in an update detected on September 10, 2026. The document header changed from 'OpenAI April 23, 2026 Safety Publication GPT-5.5 System Card' to 'GPT-5.5 System Card | OpenAI April 23, 2026 Safety Publication GPT-5.5 System Card'. This is a formatting and organizational change with no material operational difference to the document's content or disclosures.
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OpenAI April 23, 2026 Safety Publication GPT‑5.5 System Card Read the System Card (opens in a new window) Share 1.
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GPT-5.5 System Card | OpenAI April 23, 2026 Safety Publication GPT‑5.5 System Card Read the System Card (opens in a new window) Share 1.
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