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FrontierCode is hard enough that even Claude Opus 4.8 scores only 13.4% on its hardest 'Diamond' tier, which gives confidence the benchmark will remain a useful measure of AI coding progress for years to come.

Cognition's new FrontierCode benchmark proves extremely difficult for top models — Claude Opus 4.8 manages just 13.4% on the Diamond tier — suggesting it will resist saturation longer than prior coding benchmarks like SWE-Bench. ✦ AI generated

Jack Clark · Import AI · 2026-06-15 · original ↗

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The best part about the benchmark is how hard it is - Claude Opus 4.8 gets a score of 13.4% on the hardest ("Diamond") component of the benchmark, giving me some confidence that FrontierCode will be a useful way to assess progress of AI systems in the coming years.

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▦ Cognition ✳ Claude Opus 4.8 ✳ FrontierCode

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