AI API Cost Calculator – Translate Monthly Active Users into Accurate AI Cost Forecasts

Summary: AI API Cost Calculator converts Monthly Active Users (MAU) into precise cost estimates for AI models like OpenAI, Anthropic, and Gemini. It provides real-time unit economics analysis, daily burn rates, and model comparisons to help users forecast infrastructure expenses before development.

What it does

The tool offers one-click presets for common AI use cases, live data for models including GPT-5, Gemini 3, and Claude 4.5, and visual comparisons to identify the most cost-effective AI model based on user volume and usage patterns.

Who it's for

It is designed for founders, product managers, and developers who need to understand AI feature costs in terms of business metrics like MAU and retention rates.

Why it matters

It solves the challenge of translating token-based pricing into actionable cost forecasts, enabling better margin management before writing any code.