You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ModelsArea: what it touches
ImprovementsKind: in v2.1.265,
ImprovementsSection of the release
What
Claude Code has a check that prevents switching to a 1-million-token context window for certain models, previously applied to sonnet[1m], sonnet-4-6[1m], and sonnet-5[1m]. That same restriction now also applies to the model string opusplan[1m].
Why
This closes a gap where opusplan[1m] could be selected without the same 1M-context restriction that already applied to the equivalent Sonnet variants.
