Anthropic

Full Changelog: [v0.25.3...v0.25.4](https://github.com/anthropics/anthropic-sdk-python/compare/v0.25.3...v0.25.4)

Bug Fixes

* **bedrock:** correct auth implementation ([462](https://github.com/anthropics/anthropic-sdk-python/issues/462)) ([2f456f5](https://github.com/anthropics/anthropic-sdk-python/commit/2f456f59f42876dfabde94b6e36f9349fc409aef))

Full Changelog: [v0.25.2...v0.25.3](https://github.com/anthropics/anthropic-sdk-python/compare/v0.25.2...v0.25.3)

Chores

* **bedrock:** cache boto sessions ([455](https://github.com/anthropics/anthropic-sdk-python/issues/455)) ([d58adef](https://github.com/anthropics/anthropic-sdk-python/commit/d58adefc7097d98e25bb1665be2037f968000d76))

Full Changelog: [v0.25.1...v0.25.2](https://github.com/anthropics/anthropic-sdk-python/compare/v0.25.1...v0.25.2)

Chores

* **internal:** formatting ([452](https://github.com/anthropics/anthropic-sdk-python/issues/452)) ([8ac016b](https://github.com/anthropics/anthropic-sdk-python/commit/8ac016b3be19247a7323f3f9fb5aad4d4f30ced5))

Full Changelog: [v0.25.0...v0.25.1](https://github.com/anthropics/anthropic-sdk-python/compare/v0.25.0...v0.25.1)

Chores

* fix typo ([449](https://github.com/anthropics/anthropic-sdk-python/issues/449)) ([420a6c5](https://github.com/anthropics/anthropic-sdk-python/commit/420a6c5081ecd58e16b40ca5dfca582aa704c34a))

Full Changelog: [v0.24.0...v0.25.0](https://github.com/anthropics/anthropic-sdk-python/compare/v0.24.0...v0.25.0)

Features

* **bedrock:** add `copy` / `with_options` to bedrock client ([8af7c41](https://github.com/anthropics/anthropic-sdk-python/commit/8af7c41886c9e599a2199e3e496d9d04157699da))


Chores

* unknown commit message ([8af7c41](https://github.com/anthropics/anthropic-sdk-python/commit/8af7c41886c9e599a2199e3e496d9d04157699da))

Full Changelog: [v0.23.1...v0.24.0](https://github.com/anthropics/anthropic-sdk-python/compare/v0.23.1...v0.24.0)

Features

* **client:** add DefaultHttpxClient and DefaultAsyncHttpxClient ([444](https://github.com/anthropics/anthropic-sdk-python/issues/444)) ([51d2427](https://github.com/anthropics/anthropic-sdk-python/commit/51d2427c0bb51cbd17d55f827da7fb9cc05f5d06))
* **models:** add to_dict & to_json helper methods ([446](https://github.com/anthropics/anthropic-sdk-python/issues/446)) ([6709f58](https://github.com/anthropics/anthropic-sdk-python/commit/6709f58d0980669100ea0b7935259d3c05cf9648))