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KDD Cup 2026's Official Data-Agent Benchmark: Best Frontier System Hits Only 66% Accuracy

By Alexis Dufresne Published August 10, 2026 at 03:55 UTC

Summary

DataSpace is the official evaluation for KDD Cup 2026—running this week in Jeju—and reveals that harness engineering moves accuracy 15.36 points with the model held constant, meaning infrastructure choice rivals model capability for data-agent tasks; multimodal joins are the consistent failure mode across all tested systems.

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Artificial Intelligence Papers: DataSpace: Benchmarking Data Agents for Verifiable Analytics over Heterogeneous Workspaces Boyan Li, Zhuowen Liang, Yupeng Xie, Xiaotian Li… →

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Original headline: KDD Cup 2026's Official Data-Agent Benchmark: Best Frontier System Hits Only 66% Accuracy