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AI API Cost Calculator

ToolPricing

A guide to estimating your real AI API costs before you build, using the calculators available on this site.

Which Calculator to Use

For a quick, single-rate estimate, use our Token Pricing Calculator; for a more precise estimate accounting for separate input/output pricing and request volume, use our LLM Cost Calculator.

Factors That Can Change Your Real Bill

Actual usage patterns rarely match a flat average — unusually long individual requests, retries after errors, and seasonal usage spikes can all push your real bill above a simple average-based estimate.

Building In a Buffer

Given the factors above, it's sensible to budget with some buffer above your calculated estimate, particularly in the early stages of a new AI-powered feature before you have real usage data.

Frequently Asked

Which calculator should I use first?

Start with the LLM Cost Calculator for a more complete estimate accounting for separate input/output pricing.

Why might my actual bill be higher than the estimate?

Real usage rarely matches a flat average exactly — unusual request lengths, retries, and usage spikes can all push costs higher.

Should I budget extra above the calculated estimate?

Yes, especially early on before you have real usage data to refine your estimate.

Where can I find current pricing to plug into these calculators?

See our Pricing directory.

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