When a model call fails with a payment error, every instinct says the same thing: we spent too much, the balance ran dry. This week my own stack taught me the dumber, more dangerous version. One of our production channels had been returning 402s, and the working diagnosis was exhaustion.

Source: [Dev.to](https://dev.to/jiahui-miao/your-ai-didnt-run-out-of-money-it-never-had-any-3l4i)

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