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To address the limitation of siloed evaluations for autonomous agents, the authors establish HybridDeepResearch, a 380-task benchmark requiring models to interleave SQL execution on relational databases with open-web search across three compositional topologies (SQL-to-Search, Search-to-SQL, and Parallel). Evaluating this multi-environment interface is crucial because real-world analytical research hinges on maintaining strict semantic and entity constraints as evidence transfers between ambiguous text and deterministic tables. State-of-the-art agents including Claude-Sonnet-4.6 and GPT-5 achieve only 50–54% Pass@8 on the hard subset, revealing that directional constraint propagation across modalities is significantly more brittle than parallel evidence aggregation.
State-of-the-art agents lose over 45% of their performance the moment analytical reasoning requires directional constraint handoffs between SQL databases and open-web search.
While autonomous agents have made significant strides in"deep research"by iteratively navigating the open web to synthesize information, real-world problem-solving is rarely confined to a single environment. Complex analytical tasks inherently require agents to weave together evidence from both ambiguous unstructured text (e.g., the open web) and highly precise structured data (e.g., relational databases). However, existing benchmarks evaluate these modalities in isolation, failing to capture the critical"handoff"- the ability to preserve constraints when moving evidence between systems. We introduce HybridDeepResearch, to our knowledge the first deep-research benchmark that requires both web search and SQL to form a complete, verifiable answer. The benchmark contains 380 tool-dependent tasks grounded in LiveSQLBench-Base-Lite databases and public web corpora, validated through automated checks and human review, and covering three reasoning patterns: SQL2S, S2SQL, and Parallel. Evaluations across proprietary and open-weight models under various agentic scaffolds reveal that even state-of-the-art models like GLM-5.2, Claude-Sonnet-4.6 and GPT-5 achieve only about 50-54% Pass@8 on the hard subset. Notably, results show that directional reasoning is substantially more difficult than parallel intersection, highlighting that bridging structured and unstructured information spaces without losing constraints remains a major open challenge for agentic systems. Code and datasets are publicly available at GitHub (https://github.com/Snowflake-AI-Research/HybridDeepResearch) and Hugging Face (https://huggingface.co/datasets/Snowflake/HybridDeepResearch).