MathArena

Google's Gemini 4 Carbon (high) leads the MathArena math benchmark with an expected performance of 85.4%, ahead of Anthropic's Claude Fable 5.2 (max) at 82.8% and OpenAI's GPT-6.1 Sol (max) at 80.6%. With the reasoning settings used in testing, Carbon costs roughly 15 times as much as GPT-6.1 Sol.