USAMO 2026: GPT-5.4 Scores 95% vs Near-Zero Last Year — Math Competition Saturation in One Year
r/singularity / MathArena·medium signal
MathArena's USAMO 2026 evaluation shows GPT-5.4 essentially saturating the benchmark at 95%, up from near-zero performance on USAMO 2025 when solutions contained 'circular arguments, unsupported guesses, and very poor overall structure.' Gemini-3.1-Pro reaches 75%, Opus-4.6 scores 47%. The gap from GPT-5.4 to all other models remains substantial. 91 upvotes, 33 comments on r/singularity.