What this site is.

Model Cost is a small set of calculators for LLM API spend. You paste or type counts here; the math runs in this browser. The prompt is not sent to a server.

There are two tools:

• The token calculator counts characters and words, then prices one paste across Claude, GPT, Gemini, and Grok. GPT token counts use tiktoken in this tab. The other families are labeled estimates.
• The API cost calculator takes tokens per request, requests per day, and users, and scales that to a monthly bill.

Catalog input and output rates live on the ratespage. They come from the OpenRouter public list. They are not an invoice.