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Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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8 pages for anthropic_default_sonnet_model.

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Claude Code on Amazon Bedrock Claude Code CLI · in the page amazon-bedrock …, the `opus` alias on Amazon Bedrock resolves to Opus 5, and without `ANTHROPIC_DEFAULT_SONNET_MODEL`, the `sonnet` alias resolves to Sonnet 4.5. This example pins each alias to a specific version: `… Claude Code changelog Claude Code CLI · in the page changelog …Fixed `/model` picker showing a hardcoded Sonnet version label when `ANTHROPIC_DEFAULT_SONNET_MODEL` pins a different Sonnet * Fixed the "Fable 5 is now consuming usage credits" banner incorrectly… Claude Code on Claude Platform on AWS Claude Code CLI · in the page claude-platform-on-aws …de-fable-5 export ANTHROPIC_DEFAULT_OPUS_MODEL=claude-opus-4-8 export ANTHROPIC_DEFAULT_SONNET_MODEL=claude-sonnet-5 export ANTHROPIC_DEFAULT_HAIKU_MODEL=claude-haiku-4-5 ``` For the full list of mod… Environment variables Claude Code CLI · in the page env-vars …| | `ANTHROPIC_DEFAULT_SONNET_MODEL` | Model ID that the `sonnet` alias resolves to, and that `opusplan` uses wh… Claude Code on Google Cloud's Agent Platform Claude Code CLI · in the page google-vertex-ai …ias on Google Cloud's Agent Platform resolves to Opus 5, and without `ANTHROPIC_DEFAULT_SONNET_MODEL`, the `sonnet` alias resolves to Sonnet 4.5. This example pins each alias to a specific version: `… Claude Code on Microsoft Foundry Claude Code CLI · in the page microsoft-foundry …e={null} export ANTHROPIC_DEFAULT_OPUS_MODEL='claude-opus-4-8' export ANTHROPIC_DEFAULT_SONNET_MODEL='claude-sonnet-5' export ANTHROPIC_DEFAULT_HAIKU_MODEL='claude-haiku-4-5' ``` Background tasks suc… Model configuration Claude Code CLI · in the page model-config …l model name explicitly or setting `ANTHROPIC_DEFAULT_OPUS_MODEL` or `ANTHROPIC_DEFAULT_SONNET_MODEL`. Before v2.1.219, `opus` resolved to Opus 4.8 on the Anthropic API from v2.1.154, and on Claude P… Enterprise deployment overview Claude Code CLI · in the page third-party-integrations …ing `ANTHROPIC_DEFAULT_FABLE_MODEL`, `ANTHROPIC_DEFAULT_OPUS_MODEL`, `ANTHROPIC_DEFAULT_SONNET_MODEL`, and `ANTHROPIC_DEFAULT_HAIKU_MODEL`. Without pinning, model aliases resolve to Claude Code's buil…