Backend 445 installs

claude-opus-4-5-migration

by anthropics/claude-code

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…

Skill content

Opus 4.5 Migration Guide

One-shot migration from Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5.

Migration Workflow

- Search codebase for model strings and API calls

- Update model strings to Opus 4.5 (see platform-specific strings below)

- Remove unsupported beta headers

- Add effort parameter set to "high" (see references/effort.md)

- Summarize all changes made

- Tell the user: "If you encounter any issues with Opus 4.5, let me know and I can help adjust your prompts."

Model String Updates

Identify which platform the codebase uses, then replace model strings accordingly.

Unsupported Beta Headers
#claude-code #anthropics
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