The $20/month Claude 4 Opus failed to beat its free sibling, Claude 4 Sonnet, in head-to-head testing. Here's how Sonnet quietly crushed expectations with smarter, safer code.



Source: ADnet
Source Link: https://www.zdnet.com/article/anthropics-free-claude-4-sonnet-aced-my-coding-tests-but-its-paid-opus-model-somehow-didnt/