I tested Grok 4.20 Reasoning to see if it’s worth a production swap. At $1.25...

https://www.cast-bookmarks.win/is-grok-4-20-reasoning-worth-the-switch-at-1-25-per-1m-input-tokens-the-math

I tested Grok 4.20 Reasoning to see if it’s worth a production swap. At $1.25 per 1M input tokens, the price is fair, but performance is the real question. I’m breaking down the API quirks and how it handles complex logic