Models can be logged as W&B artifacts.

[pcuenca]

Upload is controlled by a new option logger/wandb/log_model. When
enabled, model files are uploaded to W&B as artifacts attached to the
current run, at the frequency specified by save_checkpoint_freq.

I'm using this feature for several purposes:

• Centralized storage of models being trained in various locations.
• Decoupling of training and testing. I usually upload models as training
  progresses, while a job running in a different computer downloads them
  and performs arbitrary metrics / evaluation tasks.