I tried it with cursor-agent, their cli - and it generated better code than expected. YMMV. It was more thoughtful and strategic than the other frontier models.
Planning was ok for me, much slower than Sonnet, but comparable. But some of the code it produces is just terrible. Maybe the routing layer sends some code-generation tasks to a much smaller model- but then I don't get why it's so slow!
The only thing that seems better to me is the parallel tool calling.
