Whenever the model is trained, it can be downloaded in the .pkl format or saved into the project files. At the moment, saved models bounded to the brick that trained them, so model assets will be auto-updated if a new model has been trained by corresponding brick. Independent model assets would be available in the future.
Saved model assets can be easily accessed and reused from the left sidebar of the pipeline. Just drag-and-drop them like any other brick. Open the context menu (right-click on the model's name) to download or delete any of them.
Models from the pipeline can be downloaded just by selecting them (left-click on model brick)
All saved models are also available at the "Models" tab. Click on the arrow-down icon to download the model.