Jonhisking

Jonhisking is the independent developer who builds and writes TokenSave, based in Seosan, South Korea. Every article on this site with the byline "Jonhisking" was written and checked by him, and every measured number comes from tests run on his own accounts and computer.

Background

He had no coding background. He started by building Android games with AI, describing what he wanted to Claude in plain language instead of writing code (vibe coding). The first one, Sperm Race, is on Google Play; the first devlog covers how it was made and the second devlog covers the 14-day closed test.

While building games he kept hitting the usage limits of his AI plans (free, then Pro, then Max 5x), and moving up a plan did not fix it. Trying to understand why led him to tokens, and to how much more some languages cost than English. TokenSave started as a token counter he built for himself and grew from there.

How the tests are done

Tests run on real accounts and real tools (Claude Code, Codex, the providers' token-counting APIs), not on numbers copied from other sites.
Each dataset page states the tool versions, the date, the prompts and how many runs were made, plus the limits of the test.
Raw logs and CSV files are published under CC BY 4.0 on Zenodo, Hugging Face, Kaggle and GitHub, so anyone can check or reuse them.
Prices are taken from each provider's official pricing page, and the date checked is shown on the page.
When a number is an estimate rather than a measurement, the page says so.

Published datasets

All datasets are listed on the data page.

Elsewhere

Contact

Found a mistake in a number or a price? Email contact@jonhisking.com or use the contact page. Corrections are made on the page and noted in its date line.