Two nanos, a Haiku, and an occasional Sonnet: the roster is the price ladder — 1× / 3.1× / 12.5× / 25× on output tokens. The interesting question is never "which model is smartest" — it's "when does the 25× model earn 25×." Sometimes it does. Watch email-hunt.
Prices as listed by OpenAI and Anthropic, July 2026.