haiku for mechanical, sonnet by default, opus only when the work still
holds a decision — which usually means the brief needs finishing rather
than a bigger model writing it.
and the part that matters: cheapness is a property of the pair, not the
model. a cheap model on a vague brief is the most expensive option
available — it returns something plausible, you reject it, you write the
brief you should have written, and you pay for the round twice.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Officer-Session: 656f5c85-e49a-4f1f-b9f3-042a04b4d043