Anthropic SDK Python v0.113.0 adds web fetch and tool support

The Anthropic SDK for Python has been updated to version 0.113.0, introducing support for the 2026-03-18 API version, including web fetching and tool usage capabilities. This release addresses a bug in async count_tokens and includes chore updates for token counting with user profiles and documentation. These enhancements are available to all users of the Python SDK.

• →add support for 20260318 web fetch and support tools
• →async count_tokens missing output_format/output_config merge block
• →accept user profile ID's when counting tokens
• →updates to descriptions and example values