LLM-as-a-Verifier: Weaker Model Verifies Stronger One, Hits 69.2% SOTA on Terminal-Bench 4
Azaliamirh · x · 2026-10-09
An open-source framework called LLM-as-a-Verifier (3.3k GitHub stars, MIT) shows a weaker model (DeepSeek V4.1 Flash) can verify trajectories from a stronger model (Opus 5.5), achieving SOTA across coding, robotics, and medical agentic benchmarks — 69.2% on Terminal-Bench 4 — with no additional training. The framework provides fine-grained feedback for any agent. The author presents orals at two COLM workshops (AI Measurement Science, Lifelong Agent). Code, docs, and paper are public.
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