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How to Handle GitHub Copilot's Token Costs Without Going Broke

GitHub Copilot moved to per-token billing and one developer's bill jumped from about $29 to a projected $750. Switching tools won't save you, because the same shift is happening everywhere. Here's why your bill exploded in plain English, the practical levers that cut it today, and how verifiable specs attack the cost at its root.

Your AI Is Charging You Rent to Re-Read the Same Code Every Day

Per-token billing turned a flat $29 AI coding plan into a $750 surprise. The waste was always there: most of the bill is your AI re-reading code it already saw. Here's why it happens and how to cut it, with prompt caching, the right model, the right plan, and a lasting memory of your codebase.

Prompt Caching: How to Pay for Context Once Instead of Every Turn

Prompt caching saves 90% on repeated context. For coding agents carrying 20-40K tokens of system prompts, the savings are enormous.