## 1.0.0 (2026-08-20)
Full Changelog: [v0.125.0...v1.0.0](https://github.com/anthropics/anthropic-sdk-python/compare/v0.125.0...v1.0.0)
### ⚠ BREAKING CHANGES
* **client:** upgrade to httpx2 and some minor breaking changes. See MIGRATION.md for details
### Features
* **client:** upgrade to httpx2 and some minor breaking changes. See MIGRATION.md for details ([33e2967](https://github.com/anthropics/anthropic-sdk-python/commit/33e296749dda59c3b9af85d9bee37ae241b92a28))
### Bug Fixes
* **beta:** stop warning about `output_format=` on the parse/stream/tool_runner helpers ([59bf261](https://github.com/anthropics/anthropic-sdk-python/commit/59bf26106d3d66cef54b926aeae4268846bf13f2))
### Chores
* **streaming:** restore the original event imports in lib/streaming/_types.py ([87e9e01](https://github.com/anthropics/anthropic-sdk-python/commit/87e9e0157c08ad4b9bb4c44081171285499b1aa3))
### Documentation
* **examples:** use adaptive thinking in thinking examples ([b5870af](https://github.com/anthropics/anthropic-sdk-python/commit/b5870afda154cc12ab15fad5ca6f53a280e09ee3))
▸ 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.