Only 78 of 125 never-solved Terminal-Bench 3 tasks survive a validity screen.

An audit of a frozen Terminal-Bench 3 / Frontier-Bench 0.1 record covering 1,081 PRs, 639 scored tasks, 28,801 trials and $105,933 of agent spend. Of the 125 tasks no model passed honestly: 14 had broken oracles, 8 were dominated by infrastructure failures, 4 were passable only through verifier bypasses, and 21 couldn't be certified solvable at all (arXiv). A zero pass rate on a frontier benchmark is not, by itself, evidence of a capability gap. Somebody should check the numerators before the next "models can't do X" post.