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3838 The version of the Claude API you want to use.
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40 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning).
40 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
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4242- `"anthropic-beta": optional array of AnthropicBeta`
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