Videos

• What a delight to summarize and provide insights into the reward model!
• It seems like a crucial step in combining the power of language models with the guidance of a reward function.
• To recap, we have two key components: (1) a language model that generates sequences, and (2) a reward model that scores these generated sequences. The combined objective function takes the form:
• P(θ | TR) = RM - β log(P(θ | TR))
• The key insight is that we want to balance two competing goals: (a) maximizing the reward (RM), and (b) minimizing the deviation from the pre-trained model (P(θ | TR)). By combining these two components with a minus sign, we effectively prioritize the reward while still constraining the generation to stay close to the pre-trained knowledge.
• This combined objective function is the foundation for training our final large language model, which can be deployed and released to the public.
• As we move forward, I'd like to highlight some key takeaways:
• • Generative AI has numerous applications, from natural language processing to computer vision.
  • Understanding the context, following instructions, and assessing the quality of generated text are essential for good generations.
  • Supervised fine-tuning and instruction fine-tuning are both important techniques for fine-tuning language models.

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