# LARS

[LARS (Layer-wise Adaptive Rate Scaling)](https:/hf.co/papers/1708.03888) is an optimizer designed for training with large batch sizes to accelerate training. LARS uses a separate learning rate for each *layer* instead of each parameter. The learning rate is calculated from a *trust ratio* between the weight and gradient norm in a layer. This helps calibrate a stable update size.

## LARS[[api-class]]

[[autodoc]] bitsandbytes.optim.LARS
    - __init__

## LARS8bit

[[autodoc]] bitsandbytes.optim.LARS8bit
    - __init__

## LARS32bit

[[autodoc]] bitsandbytes.optim.LARS32bit
    - __init__