移除了已退役的 Claude Opus 4.1 模型（注意：如果仍在引用这些模型，可能产生兼容性影响）。
更新了若干文档字符串描述。
为所有依赖添加了主版本号约束（major version constraints），以提升依赖解析的稳定性。
无新增性能数据或基准测试报告。
▸ Release Notes 英文原文（1297 字符）
## 0.121.0 (2026-08-07)
Full Changelog: [v0.120.2...v0.121.0](https://github.com/anthropics/anthropic-sdk-python/compare/v0.120.2...v0.121.0)
### Features
* **api:** add `mid-conversation-tool-changes-2026-07-01` beta ([c7d1531](https://github.com/anthropics/anthropic-sdk-python/commit/c7d1531d9d63a35430333039f8c975bba4ef0411))
* **api:** add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub ([193bae0](https://github.com/anthropics/anthropic-sdk-python/commit/193bae02806219047d484d7efcb9b91776a6c45c))
### Chores
* **api:** remove retired Claude Opus 4.1 models ([5352a33](https://github.com/anthropics/anthropic-sdk-python/commit/5352a33ade5b62ad782b522f1791b7eeeeff83be))
* **docs:** small updates to descriptions ([b8d4176](https://github.com/anthropics/anthropic-sdk-python/commit/b8d41762e264fe6721847f77daa337eab4905162))
* **docs:** updates to a few documentation strings ([3a5dd69](https://github.com/anthropics/anthropic-sdk-python/commit/3a5dd6971e0f43023533db3ed35f94ceb6c0ebde))
* ensure all dependencies have major version constraints ([#274](https://github.com/anthropics/anthropic-sdk-python/issues/274)) ([d52999b](https://github.com/anthropics/anthropic-sdk-python/commit/d52999b4f66002ffe8263756c59ab0e276c74264))
▸ 主项目介绍 · anthropics/anthropic-sdk-python
▸ README 原文（同步于 2026-07-19 13:24）
# Claude SDK for Python
[](https://pypi.org/project/anthropic/)
The Claude SDK for Python provides access to the [Claude API](https://docs.anthropic.com/en/api/) from Python applications.
## Documentation
Full documentation is available at **[platform.claude.com/docs/en/api/sdks/python](https://platform.claude.com/docs/en/api/sdks/python)**.
## Installation
```sh
pip install anthropic
```
## Getting started
```python
import os
from anthropic import Anthropic
client = Anthropic(
api_key=os.environ.get("ANTHROPIC_API_KEY"), # This is the default and can be omitted
)
message = client.messages.create(
max_tokens=1024,
messages=[
{
"role": "user",
"content": "Hello, Claude",
}
],
model="claude-opus-4-6",
)
print(message.content)
```
## Requirements
Python 3.9+
## Contributing
See [CONTRIBUTING.md](./CONTRIBUTING.md).
## License
This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.