You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Model DocsArea: what it touches
ImprovementsKind: in v2.1.242,
What probably matters to youSection of the release
What
The bundled model guidance adds a note that Opus 5 sometimes thinks before emitting its first visible block, which raises the delay before anything appears in chat and voice, along with a one-line system instruction to reduce it.
Details
The suggested line is Latency-sensitive; begin your visible answer immediately.
The advice is to apply it only where first-token latency is visible to a person, not everywhere.
It also appears as a new tuning item in the Opus 5 checklist.
Evidence
Latency-sensitive; begin your visible answer immediately.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
