Release
Fri, Jul 24, 2026
1 min read
Anthropic Sdk Csharp 12.39.0
Original release notes
12.39.0 (2026-07-24)
Full Changelog: Anthropic-v12.38.0...Anthropic-v12.39.0
Features
- api: add claude-opus-5 model (bbee155)
- api: add tool addition/removal blocks and tool_change events (bbee155)
- api: expand client-side fallback credit token types and add server-side fallbacks default option (bbee155)
Bug Fixes
- client: streaming parallel tool-use emit logic (issue #197) (#200) (c1373ac)
