Anthropic Reports $16.6 Million Billing Error for Free-Tier User

Anthropic, an AI technology firm, has acknowledged a significant billing error after its system attempted to bill a South Korean user on a free-tier account for $16.6 million. Despite the user having no API usage and no payment method on file, repeated phantom invoices were generated. This situation resulted in the user’s credit card being blocked and a four-day period before Anthropic’s support responded and resolved the issue.

While Anthropic has stated the error was unintentional and has since been corrected, this incident highlights potential risks in automated billing mechanisms, especially for blockchain and technology service providers with self-service models. Such cases underscore the importance of monitoring billing infrastructure to prevent similar issues in the future. Anthropic has not reported any broader impact or additional affected users at this time.