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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 27 Oct 2026
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Claude Code on Claude Platform on AWS changedclaude-platform-on-aws

Nearest release: v2.1.312, published under an hour before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 27 Oct 2026 19:25 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 27 Oct 2026 19:37 UTC.

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9191 
9292Claude Platform on AWS uses the same model IDs as the direct Claude API.
9393 
94The default aliases `fable`, `opus`, `sonnet`, and `haiku` resolve to Claude Code's built-in defaults for Claude Platform on AWS, which can lag the newest release. Without `ANTHROPIC_DEFAULT_OPUS_MODEL`, the `opus` alias resolves to Opus 5.5. Before v2.1.280, it resolved to Opus 5 from v2.1.219, and to Opus 4.8 from v2.1.207.
94The default aliases `fable`, `opus`, `sonnet`, and `haiku` resolve to Claude Code's built-in defaults for Claude Platform on AWS, which can lag the newest release. Without `ANTHROPIC_DEFAULT_OPUS_MODEL`, the `opus` alias resolves to Opus 5.5. Before v2.1.280, it resolved to Opus 5 from v2.1.219.
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9696If you deploy Claude Code to a team, pin the model IDs explicitly so a new release doesn't move everyone at once:
9797 
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