release
Anthropic SDK v0.109.1
June 10, 2026
v0.109.1 (2026-06-09) adds a bug fix to the API by introducing a `frontier_llm` refusal category. This matters because it gives the API a more specific way to classify model refusals, which can improve downstream handling and reporting.
0.109.1 (2026-06-09) Full Changelog: v0.109.0...v0.109.1 Bug Fixes api: add frontier_llm refusal category ( d3a806b )
Source: github.com