Claude Code v2.1.219 ·
Bundled SDK reference docs updated for the new Opus
Bundled Java and PHP API docs now describe thinking defaults and a new XHIGH effort level.
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
ImprovementsKind: in v2.1.219,
ImprovementsSection of the release
What
The Java and PHP API reference documents shipped inside the binary describe thinking behaviour for the new Opus model.
Details
- thinking is on by default for the new Opus, and omitting it runs adaptive, unlike Opus 4.8 and 4.7
- ThinkingConfigDisabled (Java) and ['type' => 'disabled'] (PHP) are accepted only at effort high or lower; XHIGH and MAX return 400
- XHIGH added to the listed effort enum values
- the basic Java example switches to the
.model(String) overload, and the refusal-fallback example now points at the previous Opus id
Evidence
thinking is on by default
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
See this entry in the whole of v2.1.219 →
