Sergio Perez, Harshita Seth

Adding knowledge to open-source LLMs

When is retrieval-augmented generation not enough? Learn the multi-stage process for deeply embedding new knowledge into an open-source LLM.

Adding knowledge to open-source LLMs
#1about 4 minutes

Understanding the LLM training pipeline and knowledge gaps

LLMs are trained through pre-training and alignment, but require new knowledge to stay current, adapt to specific domains, and acquire new skills.

#2about 5 minutes

Adding domain knowledge with continued pre-training

Continued pre-training adapts a foundation model to a specific domain by training it further on specialized, unlabeled data using self-supervised learning.

#3about 6 minutes

Developing skills and reasoning with supervised fine-tuning

Supervised fine-tuning uses instruction-based datasets to teach models specific tasks, chat capabilities, and complex reasoning through techniques like chain of thought.

#4about 8 minutes

Aligning models with human preferences using reinforcement learning

Preference alignment refines model behavior using reinforcement learning, evolving from complex RLHF with reward models to simpler methods like DPO.

#5about 2 minutes

Using frameworks like NeMo RL to simplify model alignment

Frameworks like the open-source NeMo RL abstract away the complexity of implementing advanced alignment algorithms like reinforcement learning.

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