GPT-5.4 Thinking System Card

OpenAI Blog / 3/5/2026

Signals & Early TrendsIdeas & Deep AnalysisModels & Research

Key Points

  • OpenAI published the GPT-5.4 Thinking System Card on March 5, 2026, describing the model's capabilities and safety measures.
  • The card provides detailed information on GPT-5.4’s design, alignment efforts, and usage best practices.
  • It aims to inform developers and users about responsible deployment and interaction with GPT-5.4.
  • The document is part of OpenAI’s ongoing commitment to transparency and safe AI system disclosures.
  • The Thinking System Card is accessible online with additional safety and alignment resources.

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