STORY · MODELLER_
GPT-5 Thinking system card from OpenAI
OpenAI has published a system card for GPT-5.4 Thinking, documenting properties and limitations of this reasoning model. The document covers security and behavioral aspects of the system.
WHY IT MATTERS
System cards are important for transparency around AI models' capabilities and risks. For a large model like GPT-5.4, this signals OpenAI's commitment to openness about new reasoning abilities.
SOURCES
MACHINE-GENERATED SUMMARY This summary is written by machine from the sources below. We sort and explain — but we are a way into the field, not the final word. Check the source when something matters to you.