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FROM THE AI WORLD

Today I would like to talk about Pythia, have you heard of it? EleutherAI is a non-profit AI research lab created to replicate and distribute an open-source version of GPT-3. As a result of this effort, they created models such as GPT-J and GPT-Neo, which can be very competitive compared to closed-source solutions. Their research now focuses on large language models' interpretability and alignment properties. They recently released Pythia, a unique set of 16 publicly available large language models designed to foster scientific research on this topic.

The uniqueness of this suite is that the 16 models have been trained with varying sizes and on identical data sequences with intermediate training checkpoints. This structure enables researchers to address gaps in understanding language models' learning dynamics and scaling laws. In the paper, the authors propose different issues that can be investigated thanks to this suite.

For example, they show how modifying the frequency of gendered terms during training can reduce gender bias. The models are available on HuggingFace, making analyzing and experimenting with different model sizes even easier!

Analyzing LLMs by training and scaling

Pythia combines interpretability analysis and scaling laws to understand how knowledge evolves during training in autoregressive transformers.

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