FrontierCode charts show Claude Opus 5 peaking at medium reasoning effort
zainhas · x · 2026-07-25
A FrontierCode benchmark chart suggests Claude Opus 5 may be sensitive to test-time compute settings.
On the main set, the model scores best around medium reasoning effort at 53.4%, then falls at higher settings before recovering somewhat at max. On the extended set, it peaks around medium as well, reaching 63.6% and then dropping at higher effort levels. The post frames this as a possible overthinking problem: more reasoning compute does not always improve results.
Related event: Opus 5 Coding Paradox: Higher Reasoning Leads to Lower Scores(13 posts)→
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