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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Home Docs Claude Code CLI 22 Sep 2026
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Claude Code on Claude Platform on AWS changed

claude-platform-on-aws

Nearest release: v2.1.280, 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 22 Sep 2026 16:28 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 22 Sep 2026 16:37 UTC.

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits7to this page, all time

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271271Claude Platform on AWS uses the same model IDs as the direct Claude API.
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273The 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. Before v2.1.219, it resolved to Opus 4.8, and before v2.1.207 to Opus 4.7.
273The 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, to Opus 4.8 from v2.1.207, and to Opus 4.7 before that.
274274 
275275If you deploy Claude Code to a team, pin the model IDs explicitly so a new release doesn't move everyone at once:
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