AI API Cost Calculator

How to Use This Tool

Pick a provider and model from the live models.dev catalog, enter your token usage (input, output, cache, reasoning, audio), and the cost breakdown updates instantly. Use the request-volume slider to project monthly spend, or pick a quick scenario chip to jump straight in.

Features

• Live pricing - All rates are fetched from models.dev automatically and cached for 12 hours, so new models and price changes appear without manual updates.
• Full token breakdown - Input, output, cache read, cache write, reasoning, and audio tokens each billed at their own rate, exactly like the provider invoices you.
• Monthly projection - Set requests per month and see what your AI bill will look like.
• Model comparison - Compare up to 4 models side by side with the same usage profile, including a monthly-cost bar chart.
• Pricing browser - Search and sort the entire catalog by input, output, or cache-read price to find the cheapest model for your job.
• Token estimator - Paste text for a rough token count (~4 characters per token, English).
• Context warnings - The calculator flags when your input exceeds the context window or output exceeds the max-output limit.

Understanding the Numbers

Prices are shown in USD per 1 million tokens. When a provider does not publish a rate for a component (for example cache writes), the calculator falls back to the closest equivalent rate or hides that line item. Deprecated models are marked with a red badge so you can avoid pricing them into a new project.