操作系统：Win11

Python：3.13.5

conda install -c conda-forge faiss-cpu # CPU版本

conda install -c conda-forge faiss-gpu # GPU版本（需要CUDA）

二、安装及报错1

conda install -c conda-forge faiss-cpu

└─ pin on python 3.13.* =* * is not installable because it requires
   └─ python =3.13 *, which conflicts with any installable versions previously reported.

Pins seem to be involved in the conflict. Currently pinned specs:
 - python=3.13

这主要是因为最新的faiss支持的python不是最新版本，

python可以安装次新版本，如当前是3.13.5，安装3.12的比较新的版本3.12.7。

二、查看支持的版本

conda search -c conda-forge faiss-cpu --info

faiss-cpu 1.12.0 py3.12_h2e52968_0_cpu
--------------------------------------
file name   : faiss-cpu-1.12.0-py3.12_h2e52968_0_cpu.conda
name        : faiss-cpu
version     : 1.12.0
build       : py3.12_h2e52968_0_cpu
build number: 0
size        : 1.2 MB
license     : MIT
subdir      : win-64
url         : https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/win-64/faiss-cpu-1.12.0-py3.12_h2e52968_0_cpu.conda
md5         : f7134fc1f3e49e0b30b884fdb3e3d507
timestamp   : 2025-08-12 17:11:51 UTC
dependencies:
  - libfaiss 1.12.0 py3.12_h2e52968_0_cpu
  - mkl 2023.1.0.*
  - numpy >=1.19,<2
  - numpy >=1.26.4,<2.0a0
  - packaging
  - python >=3.12,<3.13.0a0
  - python_abi 3.12.*
  - python_abi 3.12.* *_cp312
  - vc >=14.1,<15
  - vc14_runtime >=14.16.27033

三、可换为pip安装

pip install faiss-cpu # 社区维护的CPU版本

这个在python 3.13.5下也可以正常安装。

四、报错2

conda install -c conda-forge faiss-cpu

Downloading and Extracting Packages:

Preparing transaction: done
Verifying transaction: failed

CondaVerificationError: The package for libhwloc located at D:\Programs\anaconda3\pkgs\libhwloc-2.12.1-default_h88281d1_1000
appears to be corrupted. The path 'Library/bin/hwloc-diff.exe'
specified in the package manifest cannot be found.

CondaVerificationError: The package for libhwloc located at D:\Programs\anaconda3\pkgs\libhwloc-2.12.1-default_h88281d1_1000
appears to be corrupted. The path 'Library/bin/hwloc-distrib.exe'
specified in the package manifest cannot be found.

CondaVerificationError: The package for libhwloc located at D:\Programs\anaconda3\pkgs\libhwloc-2.12.1-default_h88281d1_1000
appears to be corrupted. The path 'Library/bin/hwloc-gather-cpuid.exe'
specified in the package manifest cannot be found.

CondaVerificationError: The package for libhwloc located at D:\Programs\anaconda3\pkgs\libhwloc-2.12.1-default_h88281d1_1000
appears to be corrupted. The path 'Library/bin/hwloc-patch.exe'
specified in the package manifest cannot be found.

被杀毒软件拦截了，恶意程序，（可考虑临时关闭防护）

conda install -c conda-forge faiss-gpu
不报错