The archetype package implements the Echo State Network model, the Long Short-Term memory model, and the Random Oscillators Network model. Each model is implemented as a Python class using the PyTorch library . The archetypes package defines the way each archetype performs computation and it is therefore at the center of the Archetype Computing System.

The archetype package also provided utility functions that influence the archetype computation. For example, currently available functions can create sparsely connected Archetype Networks or control the topology of the connections (ring topology, Toeplitz topology and others).