About LLMTCO
Who I am
I'm Francesco Zinghinì, an electronics engineer and a builder of deterministic online calculators, with open-source projects in Python. I'm not an ML researcher and I won't pretend to be one — what I do is model a problem correctly, write the arithmetic down, and verify it. That is exactly the skill a cost calculator needs.
Why this site exists
The "API vs self-hosting" question gets asked constantly, and most of the answers online are either marketing or unsourced widgets with prices nobody dated. I wanted a tool that treats the reader like an engineer: show the formula, show the source, show the date, and let me change every assumption.
How I keep it trustworthy
- Every formula is public. See the methodology page — nothing is hidden.
- Every number is verified. Each calculator is checked against known examples before it ships.
- Every price is dated and sourced. Defaults link to the provider's official pricing page and carry a verification date; you can override any of them.
- I correct mistakes in the open. If a formula is wrong or a price is stale, tell me and I'll fix it.
What this site is not
It's not a model quality leaderboard, not AI news, and not financial advice. It is one focused thing: the economics of LLM inference, done transparently.