claude-opus-4-5-migration

Migrate prompts and code from Claude Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5. Use when the user wants to update their codebase, prompts, or API calls to use Opus 4.5. Handles model string updates and prompt adjustments for known Opus 4.5 behavioral differences. Does NOT migrate Haiku 4.5.

#migration#upgrade#llm#claude

Quick Install

>_npx skills add anthropics/claude-code

Documentation

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Author

anthropics

@anthropics

View on GitHub

Repository

Repositoryanthropics/claude-code

Stars74,720

Last UpdatedMar 7, 2026

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