Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ModelsArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
The check that decides whether the mid-conversation system prompt beta applies to a given model no longer lists out individual model names one by one (previously including names like claude-opus-4-0, -4-1, -4-5, -4-6, -4-7, and the corresponding Sonnet and Haiku 4.x names). It now does a single version comparison against claude-opus-4-8.
Why
Switching to a version comparison means new model versions on this side of the comparison are handled automatically, rather than needing each new model name added to a hardcoded list.
