Fathom DeepResearch: Unlocking Long Horizon Information Retrieval And Synthesis For SLMs ✨ News [29/09/25]: Our paper on Fathom Search 4B has been accepted to SEA @ NeurIPS 2025 🎉 OpenReview link Introduction We introduce Fathom DeepResearch , an agentic DeepResearch system that sets state of the art performance in the open weights category on search intensive benchmarks (SimpleQA, FRAMES, WebWalkerQA, Seal0) and outperforms closed source DeepResearch agents like (Claude, Grok, Perplexity, GPT 4o) on open ended synthesis benchmark DeepResearch Bench . Built on two specialized models, Fathom Search 4B , optimized for long horizon, evidence seeking through live web search, and Fathom Synthesizer 4B , designed for open ended synthesis and report generation. Refer to our technical report for our training recipe and more exciting results! 🤗 Key Release Assets 🤗 Fathom Search 4B & 🤗 Fathom Synthesizer 4B We opensource two 4B parameter models trained to browse, extract, verify and reason over live web content, and synthesize the findings into rich citation dense reports! 🌐 Fathom WebAgents We open source our search tool server , built on top of Jina AI , Crawl4AI , Trafilatura , and…
We use cookies for essential functionality and analytics. You can accept or reject analytics cookies.Cookie policy