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Claude Opus 5 free desktop Anthropic's flagship on Windows, macOS, Linux. Claude Fable 5 vs Opus 5 and Opus 4.8 comparison panel built in. Claude Sonnet 5 vs Fable 5 vs Opus 4.8 benchmarks shown. Claude Fable 5 vs Mythos 5 vs Opus 4.8 vs GPT 5 . Claude Opus 5 release date access now download free.
A code-first Jupyter tutorial for building a Claude Sonnet 5 Managed Agent on the Anthropic API — setup, environment, file upload, streaming session, verification, output retrieval, and cleanup.