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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.219 ·

Opus 5 wired through region env vars, refusal fallbacks and pricing copy

An Opus 5 model is wired through region variables, fast mode, 1M context and pricing text.

You'll notice Notable No documentation found New Features
JSON All of v2.1.219
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ModelsArea: what it touches
New FeaturesKind: in v2.1.219,
What probably matters to youSection of the release
What

Supporting plumbing for a new Opus 5 model lands across region selection, effort/speed handling, context eligibility and billing copy.

Details
  • VERTEX_REGION_CLAUDE_5_OPUS joins the recognized Vertex region environment variables.
  • The effort/speed table treats claude-opus-5 like claude-opus-4-8 for fast mode.
  • 1M-context eligibility now matches on claude-opus-5, and the internal model-family list gains "opus5" ahead of "opus48".
  • The upsell/pricing copy branch keys on claude-opus-5 instead of claude-opus-4-8.
  • The system-prompt blurb drops Opus 4.8 and now reads "The most recent Claude models are the Claude 5 family and Haiku 4.5."
  • Some Mythos-era strings were deleted, including one reading "This model's safeguards flagged this message. This sometimes happens with safe, normal conversations."
Evidence

VERTEX_REGION_CLAUDE_5_OPUS

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

Read from
Names in the bundleVERTEX_REGION_CLAUDE_5_OPUS
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeAdded Claude Opus 5 (claude-opus-5), now the default Opus model — 1M context, fast mode at $10/$50 per Mtok

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