release
Anthropic SDK v0.108.0
June 10, 2026
v0.108.0, released on 2026-06-09, adds API support for claude-mythos-5 and claude-fable-5, plus server-side fallbacks on refusal. It also introduces client-side fallbacks middleware for API providers that do not support server-side fallbacks, improving reliability across providers.
0.108.0 (2026-06-09) Full Changelog: v0.107.1...v0.108.0 Features api: add support for claude-mythos-5 and claude-fable-5, with support for server-side fallbacks on refusal ( 6b76649 ) client: adds client-side fallbacks middleware for API providers that do not support server-side fallbacks ( 6b76649 )
Source: github.com