Technical report is available here https://www.amazon.science/publications/the-amazon-nova-fami...
TL;DR comparison of models vs frontier models on public benchmarks here https://imgur.com/a/CKMIhmm
The one that really stands out is GroundUI-1K, where it beats the competition by 46%.
Nova Pro looks like it could be a SOTA-comparable model at a lower price point.