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Amirkeivan Mohtashami

7 accepted papers

2025

CoTFormer: A Chain of Thought Driven Architecture with Budget-Adaptive Computation Cost at Inference

ICLR 2025poster

Scaling language models to larger and deeper sizes has led to significant boosts in performance. Even though the size of these models limits their application in compute-constrained environments, the race to continually develop ever larger and deeper foundational models is underway. At the same time…

Cited by 1SourcePDFScholar
2024

DenseFormer: Enhancing Information Flow in Transformers via Depth Weighted Averaging

NeurIPS 2024poster

The transformer architecture by Vaswani et al. (2017) is now ubiquitous across application domains, from natural language processing to speech processing and image understanding. We propose DenseFormer, a simple modification to the standard architecture that improves the perplexity of the model with…

Cited by 6SourcePDFScholar
2024

QuaRot: Outlier-Free 4-Bit Inference in Rotated LLMs

NeurIPS 2024poster

We introduce QuaRot, a new Quantization scheme based on Rotations, which is able to quantize LLMs end-to-end, including all weights, activations, and KV cache in 4 bits. QuaRot rotates LLMs in a way that removes outliers from the hidden state without changing the output, making quantization easier.…

2023

Special Properties of Gradient Descent with Large Learning Rates

ICML 2023poster

When training neural networks, it has been widely observed that a large step size is essential in stochastic gradient descent (SGD) for obtaining superior models. However, the effect of large step sizes on the success of SGD is not well understood theoretically. Several previous works have attribute…

Cited by 10SourcePDFScholar
2022

Masked Training of Neural Networks with Partial Gradients

AISTATS 2022poster

State-of-the-art training algorithms for deep learning models are based on stochastic gradient descent (SGD). Recently, many variations have been explored: perturbing parameters for better accuracy (such as in Extragradient), limiting SGD updates to a subset of parameters for increased efficiency (s…

Cited by 32SourcePDFScholar
2021

Critical Parameters for Scalable Distributed Learning with Large Batches and Asynchronous Updates

AISTATS 2021poster

It has been experimentally observed that the efficiency of distributed training with stochastic gradient (SGD) depends decisively on the batch size and—in asynchronous implementations—on the gradient staleness. Especially, it has been observed that the speedup saturates beyond a certain batch size a…

Cited by 23SourcePDFScholar