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

https://charliekzxa221.huicopper.com/understanding-collections-xai-s-vector-store-and-the-hidden-costs-of-rag

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