{"i":153,"comparison":{"slug":"agent-harness-vs-claude-sonnet-4-5","a":"agent-harness","b":"claude-sonnet-4-5","title":"Agent vs Claude Sonnet 4.5","seoTitle":"Agent vs Claude Sonnet 4.5: measured benchmarks","description":"Agent vs Claude Sonnet 4.5: 2 measured metrics from one study, with sample sizes, intervals and every failure counted.","verdict":"Agent and Claude Sonnet 4.5 share 2 measured metrics and 1 list-price calculation from 2 studies. No row separates them: every interval or run range overlaps, too few runs were recorded, no interval was recorded, or more is not better for that metric. The rows are 1 tie and 2 unclear; each row says why. Calculation rows are derived from list prices and recorded counts; they are not bills or runs. Agent is a full pipeline on one model; Claude Sonnet 4.5 ran under a different, simpler harness, so this compares systems, not models.","rows":{"$k":["metric","aValue","bValue","unit","aDisplay","bDisplay","winner","basis","studySlug","n","chartId","aN","bN","aContext","bContext","rangeKind","spanKind","aRange","bRange","calculation"],"$r":[["Resolved rate on the same 33 SWE-bench Verified instances",0.7576,0.7576,"rate","76% (25/33)","76% (25/33)","tie","The 95% intervals overlap (Agent 59% to 87%; Claude Sonnet 4.5 59% to 87%), so this sample cannot separate them.","swe-bench-verified",33,"swebench-same-instance-leaderboard",33,33,"full pipeline on Claude Sonnet 5.5","effort high · public mini-SWE-agent v2 run, same instances","ci95","ci95",[0.5898,0.8717],[0.5898,0.8717],"\u0001"],["Model calls per instance",49.5,51,"calls","49.5","51","unclear","More or fewer calls is not better or worse by itself; this row describes behaviour, not a winner.","swe-bench-verified",33,"swebench-model-calls",33,33,"full pipeline on Claude Sonnet 5.5","effort high · public mini-SWE-agent v2 run, same instances","\u0001","\u0001","\u0001","\u0001","\u0001"],["Recorded cost per resolved instance: Agent vs the public panel",3.706,0.913,"usd","$3.71","$0.91","unclear","No interval or range was recorded for either side, so the gap ($3.71 vs $0.91, 4.1x) is not tested against run-to-run variation.","cost-thought-experiments",25,"cost-per-resolved-agent-vs-panel",25,25,"full pipeline on Claude Sonnet 5.5 · notional","effort high · public mini-SWE-agent v2 run, same instances","\u0001","\u0001","\u0001","\u0001",true]]}}}