CMU Sphinx Downloads


CMU Sphinx toolkit has a number of packages for different tasks and applications. It’s sometimes confusing what to choose. To cleanup, here is the list

  • Pocketsphinx — recognizer library written in C.
  • Sphinxtrain — acoustic model training tools
  • Sphinxbase — support library required by Pocketsphinx and Sphinxtrain
  • Sphinx4 — adjustable, modifiable recognizer written in Java

We recommend you to use the latest available releases:

If you want to try bleeding edge version, pull the latest code from Github. Then compile packages from the source code, but remember that there is no guarantee they will be stable.

Older releases and files could be found on SourceForge

We do not maintain distribution-specific packages yet, but help to update them is truely appreciated. Some distributions already include CMUSphinx packages:


CMUSphinx assumes that you use the statistical models which describe language. There are many models trained for various acoustic conditions and various performance requirements. We collect the best models available at our download page. We hope you’ll be able to find the best model for your language there:

Download models

We are also planning to use bittorrent tracker to distribute the models but we are not there yet, if you are willing to help, please contact us