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.
Why it matters
Sonnet 5.5 keeps Sonnet 5 pricing ($2/$10 per million tokenThe chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.Full definition →), runs 30%+ faster, and scores 70.6% on Terminal-Bench 4.0. It is the first Sonnet with cyber safeguards, so some security requests may fall back.
