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Can the model plan, use tools, and finish a multi-step task?

Version / measure
Domain
Agents
Ranked models
3
Reported values
3
Reports
1 · lab
Direction
Higher is better
Status
Latest stable

Rankings

Best reported score per model across effort settings

3 models
#ModelBest settingScore
1Claude Opus 5.5Anthropicmaxcost n/a1 value · Sep 22 · source81.8%
2Claude Fable 5.1Anthropicreportedcost n/a1 value · Sep 22 · source80.7%
3Claude Opus 5Anthropicreportedcost n/a1 value · Sep 22 · source74.0%

Effort curve

Score vs. reported cost. Lines connect complete sweeps only.

0 values
No cost-linked effort sweep for this version.
Definition and comparison boundarylimited methodology

Can the model plan, use tools, and finish a multi-step task?

Agentic execution across tools, environments, or long-running workflows. Higher is better. The value is the percentage reported in this lab's table.

Harness, tools, prompts, attempt count, and benchmark version can materially change the result. Compare within one reporting context.

Anthropic prints the exact partial-score values. Its table does not specify a task-release revision, trial count, or a more detailed agent scaffold for this comparison.

Method / source ↗
OSWorld · Benchmaxxer