Correction: Newer versions of ChatGPT (GPT-5.x) are failing in insidious ways. The article has no mention of the other popular services or the dozens of open source coding assist AI models (e.g. Qwen, gpt-oss, etc).
The open source stuff is amazing and gets better just as quickly as the big AI options. Yet they're boring so they don't make the news.
Koalas have nearly identical fingerprints as well:
https://www.pbs.org/wgbh/nova/article/koala-fingerprints/