Claude Code on Amazon Bedrock changedamazon-bedrock
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441441## 1M token context window
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443Claude 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 Amazon Bedrock. Sonnet 5 is served through the [Mantle endpoint](#use-the-mantle-endpoint) and 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.
443Claude 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 Amazon Bedrock. Sonnet 5 always runs with the 1M window on both the Invoke API and the [Mantle endpoint](#use-the-mantle-endpoint), 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.
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445445The [setup wizard](#sign-in-with-bedrock) 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.
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