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Meta-evaluation on AgentEvalBench 1.0 (test)

85URFEvalAgent
5965.7572.579.25May 12, 2026

Evaluation results

MethodLinks
EvalAgentBackbone=Haiku 4.5, Comparison Baseline=LLM-Singleturn (B1), Judge=Opus 4.52026.058596.295——97.4
EvalAgentBackbone=Sonnet 4.5, Comparison Baseline=LLM-Singleturn (B1), Judge=Opus 4.52026.05859088.8——90
EvalAgentBackbone=Sonnet 4.5, Comparison Baseline=Agent-Sourcecode (B2), Judge=Opus 4.52026.0583.893.896.2——94.9
EvalAgentBackbone=Haiku 4.5, Comparison Baseline=Agent-Sourcecode (B2), Judge=Opus 4.52026.058098.897.5——100
EvalAgentBackbone=Sonnet 4.5, Comparison Baseline=Agent-Onestage (B3), Judge=Opus 4.52026.0571.278.881.2——84.2
EvalAgentBackbone=Haiku 4.5, Comparison Baseline=Agent-Onestage (B3), Judge=Opus 4.52026.0568.892.596.2——92.5
EvalAgentBackbone=Sonnet 4.5, Comparison Baseline=Agent-Twostage (B4), Judge=Opus 4.52026.0563.887.592.583.861.390
EvalAgentBackbone=Haiku 4.5, Comparison Baseline=Agent-Twostage (B4), Judge=Opus 4.52026.056083.892.57568.887.5