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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.45 ·

Default Model Updated to Sonnet 4.6

Entry
JSON All of v2.1.45
EntryKind: in v2.1.45,
ChangesSection of the release

The default model throughout Claude Code has been updated from Sonnet 4.5 to Sonnet 4.6, including:

  • Model selection descriptions now reference Sonnet 4.6
  • 1M context window options updated to Sonnet 4.6
  • Haiku description now compares to Sonnet 4.6 instead of 4.5
  • Plan mode hybrid option now uses "Opus 4.6 in plan mode, Sonnet 4.6 otherwise"
Evidence

Model descriptions updated (search for "Sonnet 4.6 - best for everyday tasks")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.45 →

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