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claude-opus-4-5-migration

Migrate Claude Sonnet 4.x and Opus 4.1 model strings to Opus 4.5.

Updated Jan 13, 2026
Search Tags:#codebase#migration#prompts#model-strings#beta-headers#op4-5-migration
One-click install
npx skills add https://github.com/lusya123/cloudcode --skill claude-opus-4-5-migration-lusya123
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: claude-opus-4-5-migration
Source: https://github.com/lusya123/cloudcode/tree/main/claude-code-main/plugins/claude-opus-4-5-migration/skills/claude-opus-4-5-migration
Command: npx skills add https://github.com/lusya123/cloudcode --skill claude-opus-4-5-migration-lusya123

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Migrates prompts and code from older Claude Sonnet 4.x and Opus 4.1 to Opus 4.5, ensuring your project uses up-to-date model strings, headers, and behavior guidance.

Core Features & Use Cases

  • Update model strings to Opus 4.5 across platforms (Anthropic API, AWS Bedrock, Google Vertex AI, Azure AI Foundry).
  • Remove unsupported beta headers, add high-effort configuration, and summarize changes for teams.
  • Provide guidance for prompt adjustments and references, streamlining cross-platform migrations.

Quick Start

Run a one-shot migration in your codebase to update all Claude Sonnet 4.x and Opus 4.1 usages to Opus 4.5 and generate a summary of changes.

Frequently Asked Questions about claude-opus-4-5-migration

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I migrate Claude Sonnet 4.x or Opus 4.1 prompts to Opus 4.5?▼

To migrate Claude prompts to Opus 4.5, scan your codebase for old model strings, update them to platform-specific Opus 4.5 target strings, remove unsupported beta headers, and apply a high-effort configuration.

What model strings do I need to update for Opus 4.5 on AWS Bedrock or Google Vertex AI?▼

Updating model strings for Opus 4.5 requires mapping source models like Sonnet 4.0 to platform-specific target strings for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry.

Do I need to remove the context-1m-2025-08-07 beta header when upgrading to Opus 4.5?▼

Yes, upgrading to Opus 4.5 requires removing the unsupported context-1m-2025-08-07 beta header from your API calls and applying a high-effort configuration.

Can I automatically scan my codebase for old Claude model strings and update them?▼

Yes, you can run a one-shot migration to scan your codebase for old Claude model strings, update them to Opus 4.5, and generate a summary of all changes made for your team.

Does Opus 4.5 migration require prompt adjustments for existing Sonnet 4.0 prompts?▼

Opus 4.5 migration provides optional prompt adjustment guidelines and references to streamline cross-platform migrations, ensuring existing Sonnet 4.0 prompts adapt to the new model behavior.

What is the best way to handle cross-platform Claude model string updates?▼

The best way to handle cross-platform Claude model string updates is applying platform-specific target strings across Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry, then summarizing changes.

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