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Sweep 09 Oct 2026 · 17:27Z Build v2.1.296 517 read Stable v2.1.287 Latest v2.1.296 Next v2.1.296 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 8 Oct 2026
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Claude Code on Google Cloud's Agent Platform changedgoogle-vertex-ai

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Upstream edited this page at 8 Oct 2026 18:41 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 8 Oct 2026 18:45 UTC.

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306306 
307307## 1M token context window
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309Claude Sonnet 5, Opus 4.6 and later, and Sonnet 4.6 support the [1M token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows#context-window-sizes-by-model) on Google Cloud's Agent Platform. Sonnet 5 always runs with the 1M window, with no `[1m]` variant to select. For the other models, Claude Code automatically enables the extended context window when you select a 1M model variant.
309Fable models, Sonnet 5 and later, and Opus 4.7 and later run with the [1M token context window](https://platform.claude.com/docs/en/build-with-claude/context-windows#context-window-sizes-by-model) by default on Google Cloud's Agent Platform, with no `[1m]` suffix needed. To keep a 200K window instead, set [`CLAUDE_CODE_DISABLE_1M_CONTEXT=1`](/docs/en/model-config#turn-off-1m-context).
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311The [setup wizard](#sign-in-with-agent-platform) offers a 1M context option when it pins models. To enable it for a manually pinned model instead, append `[1m]` to the model ID. See [Pin models for third-party deployments](/docs/en/model-config#pin-models-for-third-party-deployments) for details, including how to use the 1M window without changing the pin.
311Opus 4.6 and Sonnet 4.6 reach the 1M window when you select their `[1m]` variant. The [setup wizard](#sign-in-with-agent-platform) offers a 1M context option when it pins models. To enable it for a manually pinned model instead, append `[1m]` to the model ID. See [Pin models for third-party deployments](/docs/en/model-config#pin-models-for-third-party-deployments) for details, including how to use the 1M window without changing the pin.
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313Before v2.1.287, the Fable models and Opus 4.7 and later ran with a 200K window by default on Google Cloud's Agent Platform and reached the 1M window through a `[1m]` suffix.
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313315## Troubleshooting
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