OpenAI Inc.
03/05/2026 | News release | Distributed by Public on 03/05/2026 12:13
GPT-5.4 Thinking System Card
GPT-5.4 Thinking System Card
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Introduction
GPT-5.4 Thinking is the latest reasoning model in the GPT-5 series, and explained in our blog . The comprehensive safety mitigation approach for this model is similar to previous models in this series, but 5.4 Thinking is the first general purpose model to have implemented mitigations for High capability in Cybersecurity. The approach to cyber safety builds on the latest approaches implemented for GPT-5.3 Codex, in ChatGPT and the API.
In this card we also refer to GPT-5.4 Thinking as gpt-5.4-thinking. Note that there is not a model named GPT-5.3 Thinking, so the main model to baseline against is GPT-5.2 Thinking.
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OpenAI
OpenAI Inc. published this content on March 05, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on March 05, 2026 at 18:14 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]