Individual skill
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.
cli-tool/components/skills/development/claude-opus-4-5-migration/SKILL.md
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- Last checked
- Nov 4, 2026
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- Repository stars (not skill ratings)
- 33,216
- Repository last updated
- Nov 8, 2026
- License
- MIT
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- anthropic Repository topic
- anthropic-claude Repository topic
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SKILL.mdcore · 4,746 bytesSKILL.mdcore · 4,746 bytesreferences/effort.mddoc · 1,728 bytesreferences/prompt-snippets.mddoc · 6,139 bytes
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# 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
1. Search codebase for model strings and API calls
2. Update model strings to Opus 4.5 (see platform-specific strings below)
3. Remove unsupported beta headers
4. Add effort parameter set to `"high"` (see `references/effort.md`)
5. Summarize all changes made
6. 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