> For the complete documentation index, see [llms.txt](https://chat-sdk.gitbook.io/android/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chat-sdk.gitbook.io/android/chat-sdk-v4.md).

# Chat SDK v4

- [Development Guide](https://chat-sdk.gitbook.io/android/chat-sdk-v4/development-guide.md)
- [Updating from v4 to v5](https://chat-sdk.gitbook.io/android/chat-sdk-v4/updating-from-v4-to-v5.md)