• token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
• AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.

Frontier-model latency drops to where interactive agent loops and per-keystroke tooling become viable — but access is capacity-gated to selected API customers, so plan for a waitlist rather than a general flag.

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