A next-generation tool-use benchmark for complex, long-horizon agent workflows beyond the older tau2 telecom and airline task families.
BenchLM mirrors the published score view for TAU3-Bench. Qwen3.6 Plus leads the public snapshot at 70.7% , followed by GLM-5.1 (70.6%) and Claude Opus 4.5 (70.2%). BenchLM does not use these results to rank models overall.
Qwen3.6 Plus
Alibaba
GLM-5.1
Z.AI
Claude Opus 4.5
Anthropic
The published TAU3-Bench snapshot is tightly clustered at the top: Qwen3.6 Plus sits at 70.7%, while the third row is only 0.5 points behind. The broader top-10 spread is 5.1 points, so many of the published scores sit in a relatively narrow band.
6 models have been evaluated on TAU3-Bench. The benchmark falls in the Agentic category. This category carries a 22% weight in BenchLM.ai's overall scoring system. TAU3-Bench is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.
Year
2026
Tasks
Long-horizon tool workflows
Format
Interactive tool-use evaluation
Difficulty
Advanced tool use
TAU3-Bench appears in the Qwen3.6 launch tables as a broader, more modern tool-use benchmark than the earlier tau2 slices. BenchLM tracks it separately because it is not the same benchmark as Tau2-Telecom or Tau2-Airline.
Version
TAU3-Bench 2026
Refresh cadence
Quarterly
Staleness state
Current
Question availability
Public benchmark set
BenchLM uses freshness metadata to decide whether a benchmark should still be treated as a strong differentiator, a benchmark to watch, or a display-only reference. For the full scoring policy, see the BenchLM methodology page.
A next-generation tool-use benchmark for complex, long-horizon agent workflows beyond the older tau2 telecom and airline task families.
Qwen3.6 Plus by Alibaba currently leads with a score of 70.7% on TAU3-Bench.
6 AI models have been evaluated on TAU3-Bench on BenchLM.
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