beta-headers changedapi/beta-headers
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168168anthropic-beta: feature1,feature2,feature3
169169```
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171When using an SDK, list each feature in the `betas` parameter (for example, `betas=["feature1", "feature2"]`). With the CLI, pass a single `--beta` flag with the feature names separated by commas (for example, `--beta feature1,feature2`). Avoid repeating the flag: currently only the first flag's value takes effect.
171You can also send the `anthropic-beta` header more than once in the same request. The Claude API reads every `anthropic-beta` header, so the following is equivalent to the previous example:
172
173```http
174anthropic-beta: feature1
175anthropic-beta: feature2
176anthropic-beta: feature3
177```
178
179When using an SDK, list each feature in the `betas` parameter (for example, `betas=["feature1", "feature2"]`). With the CLI, pass a single `--beta` flag with the feature names separated by commas (for example, `--beta feature1,feature2`). You can also repeat the flag (for example, `--beta feature1 --beta feature2`).
172180
173181### Endpoint-specific headers
174182
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