FractalAIResearch/Fathom-Search-4B

Fathom-Search-4B is a 4-billion parameter model developed by FractalAIResearch, specifically optimized for long-horizon, evidence-seeking through live web search. It functions as a core component of the Fathom-DeepResearch agentic system, designed to browse, extract, verify, and reason over live web content. This model excels at information retrieval for search-intensive benchmarks, contributing to the system's ability to outperform other agents in open-ended synthesis and report generation.