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# Quantization

Quantization techniques reduce memory and computational costs by representing weights and activations with lower-precision data types like 8-bit integers (int8). This enables loading larger models you normally wouldn't be able to fit into memory, and speeding up inference. Diffusers supports 8-bit and 4-bit quantization with [bitsandbytes](https://huggingface.co/docs/bitsandbytes/en/index).

Quantization techniques that aren't supported in Transformers can be added with the [`DiffusersQuantizer`] class.

<Tip>

Learn how to quantize models in the [Quantization](../quantization/overview) guide.

</Tip>


## BitsAndBytesConfig

[[autodoc]] BitsAndBytesConfig

## DiffusersQuantizer

[[autodoc]] quantizers.base.DiffusersQuantizer
