Tokens are the small units of text that AI models read and process; the building blocks of every request, question, or command we give to AI. In 2026, these tokens have become the invisible infrastructure of the AI economy. Whether autonomous agents like OpenClaw or large language models (LLMs) like ChatGPT, tokens are what AI ultimately runs on. For developers, they’re not just a pricing unit, but a proxy for capability: how well a model understands, remembers, and performs.