We only support the installation of the requirements through conda.

Python == 2.7* or ( >= 3.4 and < 3.6 )

The development package (python-dev or python-devel on most Linux distributions) is recommended (see just below). Python 2.4 was supported up to and including the release 0.6. Python 2.6 was supported up to and including the release 0.8.2. Python 3.3 was supported up to and including release 0.9.

NumPy >= 1.9.1 <= 1.12

Earlier versions could work, but we don’t test it.

SciPy >= 0.14 < 0.17.1

Only currently required for sparse matrix and special functions support, but highly recommended. SciPy >=0.8 could work, but earlier versions have known bugs with sparse matrices.

BLAS installation (with Level 3 functionality)
  • Recommended: MKL, which is free through Conda with mkl-service package.

  • Alternatively, we suggest to install OpenBLAS, with the development headers (-dev, -devel, depending on your Linux distribution).

Optional requirements

g++ (Linux and Windows), clang (OS X)

Highly recommended. Theano can fall back on a NumPy-based Python execution model, but a C compiler allows for vastly faster execution.

Sphinx >= 0.5.1, pygments

For building the documentation. LaTeX and dvipng are also necessary for math to show up as images.


To handle large picture for gif/images.

NVIDIA CUDA drivers and SDK

Highly recommended Required for GPU code generation/execution on NVIDIA gpus. See instruction below.


Required for GPU/CPU code generation on CUDA and OpenCL devices (see: GpuArray Backend).

pycuda and skcuda

Required for some extra operations on the GPU like fft and solvers. We use them to wrap cufft and cusolver. Quick install pip install pycuda scikit-cuda. For cuda 8, the dev version of skcuda (will be released as 0.5.2) is needed for cusolver: pip install pycuda; pip install git+


Required for Theano CTC implementation. It is faster then using an equivalent graph of Theano ops.