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AI capability is getting cheaper to reach, not just bigger. Epoch AI tracked what it cost in tokens to hit the same score — about 27% accuracy on its FrontierMath benchmark — first with o4-mini in April 2025, then with GPT-5.2 in December 2025, and found the same capability got ~3x cheaper in eight months, a ~5-10x-a-year decline
Verified 2026-08-26
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