A tool-use benchmark focused on selecting, sequencing, and completing tasks with external tools.
BenchLM mirrors the published score view for Toolathlon. GPT-5.5 leads the public snapshot at 55.6% , followed by GPT-5.4 (54.6%) and DeepSeek V4 Pro (Max) (51.8%). BenchLM does not use these results to rank models overall.
GPT-5.5
OpenAI
GPT-5.4
OpenAI
DeepSeek V4 Pro (Max)
DeepSeek
The published Toolathlon snapshot is tightly clustered at the top: GPT-5.5 sits at 55.6%, while the third row is only 3.8 points behind. The broader top-10 spread is 12.1 points, so the benchmark still separates strong models even when the leaders cluster.
18 models have been evaluated on Toolathlon. The benchmark falls in the Agentic category. This category carries a 22% weight in BenchLM.ai's overall scoring system. Toolathlon is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.
Year
2026
Tasks
Multi-tool workflows
Format
Interactive tool-calling evaluation
Difficulty
Advanced tool use
Toolathlon is useful for judging whether a model can do more than answer in chat and instead complete multi-step tool workflows.
Version
Toolathlon 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 tool-use benchmark focused on selecting, sequencing, and completing tasks with external tools.
GPT-5.5 by OpenAI currently leads with a score of 55.6% on Toolathlon.
18 AI models have been evaluated on Toolathlon on BenchLM.
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