If you've ever looked at a token counter after a long session with Claude Code, Codex, or Copilot and tried to reconcile it with your actual bill, you've probably hit a wall. Here's why that number is structurally unreliable, not just imprecise. 1.
Source: [Dev.to](https://dev.to/jdevleon/why-your-ai-cost-dashboard-never-matches-your-invoice-4eba)