microsoft/BitBLAS

• hightopics#1

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  llm, quantization, mixed-precision, blas, gpu, deep-learning, pytorch, inference-optimization, machine-learning, hardware-acceleration

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• highreadme#2

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  # BitBLAS
  
  BitBLAS is a library to support mixed-precision BLAS operations on GPUs, for example, the $W_{wdtype}A_{adtype}$ mixed-precision matrix multiplication where $C_{cdtype}[M, N] = A_{adtype}[M, K] \times W_{wdtype}[N, K]$.
  BitBLAS aims to support efficient mixed-precision DNN model deployment, especially the $W_{wdtype}A_{adtype}$ quantization in large language models (LLMs), for example, the $W_{UINT4}A_{FP16}$ in GPTQ, the $W_{INT2}A_{FP16}$ in BitDistiller, the $W_{INT2}A_{INT8}$ in BitNet-b1.58. BitBLAS is based on techniques from our paper "Ladder: Enabling Efficient Low-Precision Deep Learning Computing through Hardware-aware Tensor Transformation" at OSDI'24.

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  # BitBLAS: High-Performance Mixed-Precision BLAS for Quantized LLM Inference
  
  BitBLAS is a specialized library for **efficient mixed-precision BLAS operations on GPUs**, specifically designed to accelerate the deployment of **quantized Large Language Models (LLMs)**. Unlike general-purpose BLAS libraries or broader ML frameworks, BitBLAS focuses on optimizing critical $W_{wdtype}A_{adtype}$ matrix multiplications (e.g., FP16xINT4, INT8xINT2) essential for low-bit LLM inference. It leverages techniques from our OSDI'24 paper 'Ladder: Enabling Efficient Low-Precision Deep Learning Computing through Hardware-aware Tensor Transformation'.

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• mediumhomepage#3

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  https://microsoft.github.io/BitBLAS

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Category GEO backends resolved for this scan: google/gemini-2.5-flash, deepseek/deepseek-v4-flash

• CATEGORY QUERY

  How to efficiently deploy quantized large language models using mixed-precision matrix multiplication?

  you: not recommended
  AI recommended (in order):

  1. NVIDIA TensorRT
  2. OpenVINO
  3. ONNX Runtime
  4. DeepSpeed
  5. PyTorch
  6. TVM

  AI recommended 6 alternatives but never named microsoft/BitBLAS. This is the gap to close.

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• CATEGORY QUERY

  Seeking a high-performance library for mixed-precision BLAS operations on GPUs for deep learning models.

  you: not recommended
  AI recommended (in order):

  1. cuBLAS
  2. cuDNN
  3. rocBLAS (ROCm/rocBLAS)
  4. PyTorch (pytorch/pytorch)
  5. TensorFlow (tensorflow/tensorflow)
  6. JAX (google/jax)

  AI recommended 6 alternatives but never named microsoft/BitBLAS. This is the gap to close.

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• Metadata completeness

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• README presence

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• Compared to common alternatives in this category, what is the core differentiator of microsoft/BitBLAS?

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• If a team adopts microsoft/BitBLAS in production, what risks or prerequisites should they evaluate first?

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• In one sentence, what problem does the repo microsoft/BitBLAS solve, and who is the primary audience?

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