Even with the V4 Pro discount, the V4 Flash model gives you the best performance per unit dollar, and better performance overall for agentic, tool-heavy workloads. V4 Pro is smarter in one-shot reasoning, but at a significant speed difference. The performance, cost, and speed, makes V4 Flash our top flash model today by far.
Data at https://gertlabs.com/rankings
In my use cases (mainly very large summarization and idea extraction) it’s pretty shit though compared to Pro.