LLM API Cost Calculator
Turn token prices into a monthly budget before your feature hits production.
Free · no signup · runs in your browserWhat this calculator is for
Use this when you know roughly how large each model call is and how many calls your product will make. It is the fastest way to translate a provider pricing table into a monthly operating estimate.
The math
Actual invoices can differ because providers may apply long-context pricing, caching rules, batch rates, tool-call fees, regional processing, negotiated contracts, taxes, or future pricing changes. Treat the output as a planning estimate.
Pricing sources
Current model rates are sourced from official provider pricing pages and verified on August 28, 2026. The methodology page records the source links and known limitations.
Frequently asked question
Why are input and output priced separately?
Most providers publish distinct rates for tokens sent to the model and tokens generated by the model, so both parts must be modeled independently.
Can I use this estimate for a production budget?
Use it to create scenarios and catch order-of-magnitude mistakes. Before committing spend, verify the selected model's live provider pricing and compare the estimate with actual usage telemetry.