New framework guides LLMs to choose between RAG and long-context processing

Researchers have developed a new framework called Pre-Route to help large language models decide whether to use retrieval-augmented generation (RAG) or long-context (LC) processing for document understanding. This proactive system uses lightweight metadata to analyze tasks, estimate coverage, and predict information needs, leading to more explainable and cost-effective routing decisions. Experiments show that Pre-Route outperforms existing methods on benchmarks like LaRA and LongBench-v2, demonstrating that LLMs have latent routing abilities that can be effectively elicited and even distilled into smaller models. AI

IMPACT Improves efficiency and explainability in LLM document processing, potentially reducing costs for long-context tasks.

RANK_REASON The cluster contains an academic paper detailing a new framework and experimental results. [lever_c_demoted from research: ic=1 ai=1.0]

Read on arXiv cs.CL →

• LaRA
• LLMs
• LongBench-v2
• Pre-Route

• paper
• model release

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