Developer says Anthropic Console charged $504 instead of $5.04 due to decimal input bug

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A Costa Rica-based LegalTech attorney reports that loading credits onto an Anthropic API account resulted in a $504.00 charge after entering 5.04, which they attribute to a decimal separator handling error. They say the platform silently removed the decimal and processed the charge without a confirmation screen. The user says they filed a chargeback with their bank, which can take up to 120 days, and that automated support denied a refund. They argue the same flaw could cause larger overcharges for other users and are calling on Anthropic's billing team to review the case.

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