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.

1.75x

Quality

80%

Does it follow best practices?

Impact

91%

1.75x

Average score across 6 eval scenarios

Securityby

Passed

No findings from the security scan

Preview

This is a new way to view eval results. We're still working on it, so the layout may change.

Run	Type	Date	Status
baseline vs usage-spec With / without context 7 months ago Completed	With / without context	7 months ago	Completed
baseline vs usage-spec With / without context 7 months ago Failed	With / without context	7 months ago	Failed

Eval run

019ccc39-3c82-7435-9298-275158389354

Run 7 months ago

Stats are not available yet

The run is available. Its result stats will appear here when they are ready.

Repository: anthropics/claude-code
Path: plugins/claude-opus-4-5-migration/skills/claude-opus-4-5-migration/SKILL.md
Commit: c948155

Evaluated: 7 months ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Upgrade Claude Model in Production API Client Upgrade AI Assistant to Latest Opus Model on AWS Bedrock Fix AI Agent Over-Calling Tools After Model Upgrade

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.