chore: upgrade to cupy-cuda13

Author: ilan-gold

.github/workflows/test-gpu.yml

@@ -66,13 +66,12 @@ jobs:
         uses: astral-sh/setup-uv@v6 # TODO: upgrade once cirun image supports node 24
         with:
           enable-cache: true
-          # Any Cuda 14+ will support Python 3.14: https://github.com/cupy/cupy/issues/9346
-          python-version: '3.13'  # ${{ env.max_python_version }}
+          python-version: ${{ env.max_python_version }}
 
       - name: Install AnnData
         run: |
           uv venv
-          uv pip install -e ".[dev,test,cu12]" -c ci/constraints.txt
+          uv pip install -e ".[dev,test,cu13]" -c ci/constraints.txt
 
       - name: Env list
         run: uv pip list

pyproject.toml

@@ -101,7 +101,7 @@ test-min = [
 test = [ "anndata[test-min,lazy]", "fast-array-utils>=1.2.3" ]
 gpu = [ "cupy" ]
 cu12 = [ "cupy-cuda12x" ]
-cu11 = [ "cupy-cuda11x" ]
+cu13 = [ "cupy-cuda13x" ]
 # requests and aiohttp needed for zarr remote data
 lazy = [ "xarray>=2025.06.1", "aiohttp", "requests", "anndata[dask]" ]
 # https://github.com/dask/dask/issues/11290