DEVELOPER DISCLOSURE · OpenAI

GPT-5.4 Thinking System Card

Developer documentation covering GPT-5.4 Thinking.

Published 2026-03-05

Developer-authored disclosure. The section map was checked; this is not a full reading or result extraction. NUWA has not independently replicated these experiments.

Models covered

GPT-5.4 Thinking →

capability · Original HTML → named Preparedness / Alignment / CoT Monitorability sections

MLE-bench

Protocol record →

Evaluates autonomous machine-learning engineering using competition tasks and human performance baselines.

A protocol mention does not establish cross-report comparability or independent replication.

This section is catalogued; no precise numerical result has been extracted here. Open the original report for its figures and full findings.

Report coverage

Section	Source location	Treatment
Preparedness, alignment and monitorability	Original HTML → named Preparedness / Alignment / CoT Monitorability sections	Linked protocol Comparator evaluation sections located; capability, refusal, monitoring and deployment safeguards are separate constructs. No numerical evidence is imported.

References

[1] GPT-5.4 Thinking System Card. 2026-03-05