Interpretability in transformer-based LLMs
Transformer-based LLMs present unique challenges and opportunities for interpretability. Some key areas to consider are as follows:
- Multi-head attention: Analyzing individual attention heads to reveal specialized functions
- Positional embeddings: Understanding how models use positional information
- Layer-wise analysis: Examining how different linguistic features are captured across layers
Here’s an example of analyzing multi-head attention:
import torch from transformers import BertTokenizer, BertModel import matplotlib.pyplot as plt def analyze_multihead_attention(model, tokenizer, text): Â Â Â Â inputs = tokenizer(text, return_tensors="pt") Â Â Â Â outputs = model(inputs, output_attentions=True) Â Â Â Â attention = outputs.attentions[-1].squeeze().detach().numpy() Â Â Â Â tokens = tokenizer.convert_ids_to_tokens(inputs["input_ids...