What it is Terminal Bench is a benchmark the Every team cites when evaluating coding models — in the captured material, it is the reported percentage score for how a model performs on terminal-based tasks. In the Opus 4.6 vs. Codex 5.3 head-to-head, the team quoted Terminal Bench for Opus at around 77%, alongside its reported agentic coding evals of roughly 59–65%.[^d796aeea@0]