Anthropic SDK (Python) releases · July 24, 2026 · 1 min read

v0.120.0

#model-release #version-bump #developer-tool

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0.120.0 (2026-07-24)

Full Changelog: v0.119.0...v0.120.0

Features

api: add claude-opus-5 model (bf4e31c)
api: add tool addition/removal blocks and tool_change events (bf4e31c)
api: expand client-side fallback credit token types and add server-side fallbacks default option (bf4e31c)

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