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Reverse-engineered token Value of coding agent Plans

The article reverse-engineers token pricing of AI coding agent plans (Cursor, Windsurf, Copilot, Codeium). Pro plans are often 1.5–3× cheaper per token than buying the model directly, while Ultra plans can be 10× more expensive. It offers a framework for developers to compare plans objectively.

Background

- AI coding agents (Cursor, Copilot, Devin) break coding tasks into step-by-step "plans." Each step consumes LLM tokens — the basic unit AI models use to process text, which cost real money on APIs like GPT-4. - The author reverse-engineered popular agents to measure each step's "token value": how many tokens burned vs. how much actual coding work got done. Key finding: many agents waste tokens on redundant file reads, verbose internal chatter, and low-value self-checks. - This matters because tokens = cost and speed. An agent that burns 50,000 tokens on planning before writing one line of code feels slow and expensive. The article offers a framework for evaluating whether an agent is efficient or just burning compute. - For developers building or choosing coding agents, this reveals the hidden economics behind AI tooling — beyond the demo videos and hype.

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