Model usage is billed per token, and for one ordinary question and answer the amount is very small. The bill only becomes significant at high volume, or when every single call carries a very large input. Token prices change several times a year, so read them off the vendor's page.
The part that determines success isn't the model fee. It's the engineering around it: giving the model the right data, testing for accuracy, and building guardrails so it fails safely. That's where the real budget goes, and where cheap builds cut corners.
Updated July 2026
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