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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.277 ·

Model family list touched at several offsets (opus/sonnet/mythos cycling)

Several entries in the internal model-family table were reassigned between opus, sonnet, and mythos

Under the hood Internal Changes
JSON All of v2.1.277
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ModelsArea: what it touches
Internal ChangesKind: in v2.1.277,
Internal ChangesSection of the release

Unclear Which specific models changed family, and what practical effect the reassignment has, is not stated.

What

Multiple rows in the internal table that tracks each model's capability family had their value changed among "opus", "sonnet", and "mythos" across a number of separate edits.

Why

This affects how these models are internally categorized for capability purposes, though the finding doesn't specify which models moved or what depends on their family assignment.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhich specific models changed family, and what practical effect the reassignment has, is not stated.

See this entry in the whole of v2.1.277 →

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