AI BriefingGPT-5.4 Thinking System Card
Key point
OpenAI has released the GPT-5.4 Thinking system card, which applies cybersecurity risk mitigation measures for the first time.
Details
GPT-5.4 Thinking is the latest reasoning model in the GPT-5 series. This model adopts a comprehensive safety mitigation approach similar to previous models in the series, but is notable as the first general-purpose model to implement mitigations for high capability in the Cybersecurity domain.
The approach to cyber safety builds on the latest approach from GPT-5.3 Codex, which was applied to ChatGPT and the API.
This card refers to the model as gpt-5.4-thinking. Note that since a GPT-5.3 Thinking model does not exist, GPT-5.2 Thinking is used as the baseline model for performance comparisons.
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