Knowledge Injection in LLMs: Fine-Tuning and RAG
Blog post from Zilliz
RAG (Retrieval Augmented Generation) consistently outperformed fine-tuning in knowledge-intensive tasks, demonstrating its superior ability to integrate external information. Fine-tuning improved performance over the base model but was not as competitive as RAG. Data augmentation proved beneficial for fine-tuning by exposing models to multiple variations of the same fact during training, enhancing knowledge retention. RAG's superiority over fine-tuning was attributed to its contextual relevance and reduced hallucinations, making it a more reliable choice for integrating external knowledge. The use of vector databases like Milvus enabled efficient storage and retrieval of high-dimensional embeddings, further improving factual accuracy and reducing computational latency. Future research directions include exploring hybrid knowledge integration methods, combining fine-tuning approaches, and developing new evaluation frameworks to better assess knowledge retention in Large Language Models (LLMs).
| Trend | Post Mentions | Total Month Mentions | Posts | Companies | MoM |
|---|---|---|---|---|---|
| RAG | 63 | 1,528 | 261 | 92 | -30% |
| AI Model Fine-tuning | 53 | 643 | 171 | 88 | -36% |
| LLM | 30 | 4,013 | 569 | 191 | -13% |
| Vector Search | 19 | 1,947 | 300 | 116 | -32% |
| Reinforcement learning | 7 | 180 | 54 | 33 | -9% |
| Real-time | 5 | 3,875 | 964 | 250 | -11% |
| AI Guardrails | 1 | 242 | 83 | 45 | -30% |
| Data Pipeline | 1 | 458 | 184 | 78 | -16% |
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