Machine Heart

Oct 30, 2026 · Artificial Intelligence

Top AI Models Score Only 39% on Real-World Deep Search Benchmark

Researchers from HKUST Guangzhou, Fudan, Washington, Imperial College, and Stanford introduce OpenDS-World, a benchmark of 200 real-world deep search tasks spanning 4 modalities, 42 resource formats, and 7 access types; 12 frontier models including GPT-6 Astra, Claude Opus 5.5, and Gemini 3.8 Flash achieve at best 39% accuracy, revealing severe challenges in long-horizon decision-making, tool failure recovery, and search termination.