Estimating API burn rates across different providers (OpenAI, Anthropic, Google) has become a bit of a spreadsheet nightmare. To solve this for my own projects, I built a lightweight LLM Cost Calculator.

https://preview.redd.it/w1xhgd7bx9pg1.png?width=850&format=png&auto=webp&s=4bf1490dbcae94da289b1f9ecde9986f5385462e

Why use this?

• Real-time Comparison: Instantly compare daily, monthly, and yearly projections for models like GPT-4o vs. Gemini 1.5 Flash.
• Privacy-First: It’s a pure front-end tool. Your usage data and token counts never leave your browser.
• Granular Control: Easily adjust input/output ratios and request volume to see the true cost of your specific workflow.

I built this as a utility for my project hub. It is 100% free, has no paywalls, and requires no account. I’m just looking to provide value to fellow devs and get some feedback.

Try it here: LLM Cost Calculator

I’d love to hear what other models or features (like tokens-per-second cost) you’d like to see added!