
LLM-Microscope
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Stars: 70

LLM-Microscope is a toolkit designed for quantifying and visualizing language model internals. It provides functions for calculating anisotropy, intrinsic dimension, and linearity score. The toolkit also includes a Logit Lens feature for analyzing model predictions and losses. Users can easily install the toolkit using pip and explore the functionalities through provided examples.
README:
This repository contains the official implementation of the code for papers "LLM-Microscope: A Toolkit for Quantifying and Visualizing Language Model Internals" and "Your Transformer is Secretly Linear".
We've also created a pip package containing the functions from demo notebook.
Use pip install llm-microscope
to install it.
import torch
from llm_microscope import (
calculate_anisotropy_torch,
intrinsic_dimension,
procrustes_similarity,
procrustes_similarity_centered,
load_enwiki_text
)
device = 'cpu'
X = torch.randn((1000, 10)) # pseudo-random "features", 1000 vectors with dim=10.
Y = torch.randn((1000, 10)) # pseudo-random "features", 1000 vectors with dim=10.
anisotropy = calculate_anisotropy_torch(X) # anisotropy score
int_dim = intrinsic_dimension(X, device) # intrinsic dimension
linearity_score = procrustes_similarity(X, Y) # linearity score from the paper
centered_linearity_score = procrustes_similarity_centered(X, Y) # the same as linearity between X and Y - X
# You can also download the dataset that we used in the paper using load_enwiki_text function:
text = llm_microscope.load_enwiki_text()
import torch
from transformers import AutoTokenizer, AutoModelForCausalLM
from llm_microscope import logit_lens, normalize_weights, plot_word_table, replace_bad_chars
device = 'cuda'
model_name = "facebook/opt-1.3b"
text = "Lorem Ipsum is simply dummy text of the printing"
tokenizer= AutoTokenizer.from_pretrained(model_name)
model = AutoModelForCausalLM.from_pretrained(model_name, trust_remote_code=True).bfloat16().to(device)
tokens = tokenizer.encode(text)
words = [tokenizer.decode([tok]) for tok in tokens]
words = [replace_bad_chars(word) for word in words]
predictions, losses, decoded_words = logit_lens(model, tokenizer, text)
losses = normalize_weights(-losses, normalization_type="global")
plot_word_table(decoded_words, losses, words)
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