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Use HF papers (#38184)

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* Use hf papers

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Quentin Gallouédec
2025-06-13 13:07:09 +02:00
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docs/source/en/quantization/bitnet.md
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# BitNet
[BitNet](https://arxiv.org/abs/2402.17764) replaces traditional linear layers in Multi-Head Attention and feed-forward networks with specialized BitLinear layers. The BitLinear layers quantize the weights using ternary precision (with values of -1, 0, and 1) and quantize the activations to 8-bit precision.
[BitNet](https://huggingface.co/papers/2402.17764) replaces traditional linear layers in Multi-Head Attention and feed-forward networks with specialized BitLinear layers. The BitLinear layers quantize the weights using ternary precision (with values of -1, 0, and 1) and quantize the activations to 8-bit precision.
<figure style="text-align: center;">
<img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/blog/1.58llm_extreme_quantization/bitlinear.png" alt="Alt Text" />
@@ -27,7 +27,7 @@ BitNet models can't be quantized on the fly. They need to be quantized during pr
1. Compute the average of the absolute values of the weight matrix and use as a scale.
2. Divide the weights by the scale, round the values, constrain them between -1 and 1, and rescale them to continue in full precision.
3. Activations are quantized to a specified bit-width (8-bit) using [absmax](https://arxiv.org/pdf/2208.07339) quantization (symmetric per channel quantization). This involves scaling the activations into a range of [−128,127].
3. Activations are quantized to a specified bit-width (8-bit) using [absmax](https://huggingface.co/papers/2208.07339) quantization (symmetric per channel quantization). This involves scaling the activations into a range of [−128,127].
Refer to this [PR](https://github.com/huggingface/nanotron/pull/180) to pretrain or fine-tune a 1.58-bit model with [Nanotron](https://github.com/huggingface/nanotron). For fine-tuning, convert a model from the Hugging Face to Nanotron format. Find the conversion steps in this [PR](https://github.com/huggingface/nanotron/pull/174).