32. Token Economics for Builders

Overview and links for this section of the guide.

Why builders need to count tokens

In traditional cloud computing, you pay for server uptime or requests per second. In the LLM world, you pay for "thought." Specifically, you pay for the amount of text the model reads (input) and the amount of text it writes (output).

Understanding token economics is the difference between a side project that costs $0.50/month and one that accidentally costs $500 overnight. It's also critical for performance—more tokens means slower responses.

The Golden Rule of Token Econ

Input tokens are cheap. Output tokens are expensive. Computation (reasoning) happens on output. If you can move work to input (examples, context), you save money.

Core Concepts

We'll cover the practical side of managing your token budget:

  • Hidden costs: Why a "short" prompt might actually be huge (chat history, system instructions).
  • Compression: How to make context smaller without losing semantic meaning.
  • Model selection: The trade-off between "smart & expensive" vs "fast & cheap."
  • Batching: When to process data in bulk to save on overhead.

Where to go next