OpenAI published the system card for GPT-5.5 Instant, its latest model in the instant series. The document outlines the company's safety evaluation methodology, including assessment criteria for potential risks, and documents the safety measures implemented before the model's deployment. The release serves as the baseline against the previous GPT-5.3 Instant version.

This release is notable as the first 'Instant' model classified as having 'High capability' in cybersecurity and biological & chemical preparedness categories. Because of this classification, OpenAI implemented specific safeguards consistent with these elevated risk profiles. The documentation also distinguishes this model from the separate 'GPT-5.5 Thinking' model to prevent confusion.

OpenAI published the system card for GPT-5.5 Instant, its latest model in the instant series. The document outlines the company's safety evaluation methodology, including assessment criteria for potential risks, and documents the safety measures implemented before the model's deployment. The release serves as the baseline against the previous GPT-5.3 Instant version.

This release is notable as the first 'Instant' model classified as having 'High capability' in cybersecurity and biological & chemical preparedness categories. Because of this classification, OpenAI implemented specific safeguards consistent with these elevated risk profiles. The documentation also distinguishes this model from the separate 'GPT-5.5 Thinking' model to prevent confusion.