Claude Code v2.1.219 ·
A reasoning-effort table now includes settings for a model named claude-opus-5, with new medium and high profiles.
Under the hoodTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Model ConfigArea: what it touches
Internal ChangesKind: in v2.1.219,
What probably matters to youSection of the release
What
The per-model reasoning-effort table gains a row for claude-opus-5, so effort levels map to model-specific settings when that model is in effect.
Details
- low reuses the shared low profile; max reuses the shared max
- medium and high both map to a new cell "o5-bmin" with
modelEffort: "typed" and no finder budget hint - xhigh reuses the existing o48-xhigh-v1 profile
- the cell name "o5-bmin" does not appear in 2.1.218, and there is a downstream branch that special-cases it
Evidence
o5-bmin
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeAdded Claude Opus 5 (claude-opus-5), now the default Opus model — 1M context, fast mode at $10/$50 per Mtok
See this entry in the whole of v2.1.219 →
