LiveCodeBench v6

LiveCodeBench continuously scrapes new problems from LeetCode, AtCoder and Codeforces contests, tagging each with its publication date so models can be evaluated only on problems released after their training cutoff. Release v6 contains 1,055 problems spanning May 2023 through April 2025. The headline metric is pass@1 on code generation, computed with test-case checkers, and the official leaderboard exposes a date-range slider that recomputes scores for the selected window while flagging potentially contaminated models. Most 2026 frontier scores on this board are vendor-reported on the full v6 set via aggregators, since the official site's own table has not been refreshed past the o3/Gemini 2.5 era.