GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...
Tested on 10 benchmarks with 63.2% average. Top scores: ARC-AGI (94.5%), GPQA diamond (92.8%), ARC-AGI-2 (83.3%).
Step 3.5 Flash scores 89.5 (102% as good) at $0.09/1M input · 100% cheaper
Unusual and adversarial machine learning challenges. Tests robustness of reasoning about edge cases in ML systems.
Abstraction and Reasoning Corpus. Tests fluid intelligence through novel visual pattern recognition puzzles. Core measure of general intelligence.
ARC-AGI 2, harder sequel to ARC. More complex abstract reasoning patterns that test generalization ability beyond training data.
Deceptively simple questions that humans find easy but AI models often get wrong. Tests common sense and reasoning gaps.
Original research-level math problems created by professional mathematicians. Problems are unpublished and cannot be memorized.
Hardest tier of FrontierMath. Problems at the frontier of human mathematical ability, many unsolved by most mathematicians.
- Typemultimodal
- Context1.1M tokens (~525 books)
- ReleasedMar 2026
- LicenseProprietary
- StatusActive
- Cost / Message~$0.240