GPT-5.4 Thinking System Card released — reasoning model documentation available

AI Impact Summary

OpenAI has released a system card for GPT-5.4 Thinking, documenting the model's reasoning capabilities, safety properties, and intended use cases. System cards provide technical teams with critical information about model behavior, limitations, and recommended guardrails for production deployment. This documentation is essential for teams evaluating whether GPT-5.4 Thinking meets their accuracy, latency, and cost requirements compared to existing models.