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Sweep 03 Nov 2026 · 22:27Z Build v2.1.318 536 read Stable v2.1.311 Latest v2.1.318 Next v2.1.318 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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go changedcli-sdks-libraries/sdks/go

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725725## Semantic versioning
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727Each major version of this SDK sends one API version in the `anthropic-version` header by default, and a new major version comes with each new API version. The first major version that sends `2026-10-21` is 2.0.0, whose module path is `github.com/anthropics/anthropic-sdk-go/v2`; see [Migrating to API version 2026-10-21](https://platform.claude.com/docs/en/api/migration-2026-10-21#upgrade).
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729727This package generally follows [SemVer](https://semver.org/spec/v2.0.0.html) conventions, though certain backward-incompatible changes may be released as minor versions:
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7317291. Changes to library internals that are technically public but not intended or documented for external use.
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7327302. Changes that aren’t expected to impact the vast majority of users in practice.
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734732Backward compatibility is taken seriously to ensure you can rely on a smooth upgrade experience.
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734Every request to the Claude API uses an API version. With this SDK, your requests use the API version that was current when your SDK’s major version was released, so you move to a new API version by upgrading to a new major version. Version 2.0.0 is the first to use `2026-10-21`. Its module path is `github.com/anthropics/anthropic-sdk-go/v2`. See [Migrating to API version 2026-10-21](https://platform.claude.com/docs/en/api/migration-2026-10-21#upgrade) for how to upgrade.
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736736Your feedback is welcome; open an [issue](https://github.com/anthropics/anthropic-sdk-go/issues) with questions, bugs, or suggestions.
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