What happened
A developer leading a team in Costa Rica went to load credit onto their Anthropic API account and typed 5.04. With no confirmation or review screen, the Console charged their card $504.00, and VAT added $65.52, for $569.52 in all.
The automated support bot “repeatedly and rigidly denied the refund”, closing the ticket by citing generic policies.
Why it happened
They posted about it on Hacker News on 16 October, and an Anthropic employee replied the same day: “A typed “5,04” got converted to $504. We’re fixing the bug now and the support team will reach out to you directly to address your case, shortly.”
The developer says they typed a dot, not a comma.
How it ended
The bug was being fixed and support was to contact the developer directly. The thread does not record a refund.





