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claude-opus-4-5-migration

Migrate Claude model references and API calls to Opus 4.5.

1|Updated Apr 8, 2026
Search Tags:#migration#llm#claude#api-integration#opus-4-5#prompt-engineering#model-update
One-click install
npx skills add https://github.com/Tashima-Tarsh/Disha --skill claude-opus-4-5-migration-tashima-tarsh
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: claude-opus-4-5-migration
Source: https://github.com/Tashima-Tarsh/Disha/tree/main/disha/services/integrations/Anthropic/plugins/claude-opus-4-5-migration/skills/claude-opus-4-5-migration
Command: npx skills add https://github.com/Tashima-Tarsh/Disha --skill claude-opus-4-5-migration-tashima-tarsh

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Upgrading codebases, prompts, and API calls from older Claude models (Sonnet 4.0, Sonnet 4.5, Opus 4.1) to Opus 4.5 requires updating model strings, removing deprecated beta headers, and adjusting prompts for new behavioral differences, which is time-consuming and error-prone when done manually.

Core Features & Use Cases

  • Cross-Platform Model String Updates: Automatically replace outdated model strings with correct Opus 4.5 identifiers for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry.
  • Deprecated Header Cleanup: Removes unsupported beta headers like the 1M context beta and adds required effort parameters for optimal Opus 4.5 performance.
  • Conditional Prompt Adjustments: Applies targeted fixes for known Opus 4.5 issues including tool overtriggering, over-engineering, generic frontend outputs, and thinking sensitivity, only when users report specific problems.
  • Use Case: A development team using Claude Sonnet 4.5 in their internal tooling can run this migration to update all model references, remove deprecated beta flags, and adjust prompts to avoid unnecessary tool calls or generic frontend designs.

Quick Start

Use the claude-opus-4-5-migration skill to migrate all Claude model references, API calls, and prompts in your codebase from Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5, including removing unsupported beta headers and applying prompt fixes for known behavioral differences.

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 API calls from Sonnet 4.5 to Opus 4.5?▼

Migrating Claude API calls to Opus 4.5 requires updating model strings, removing unsupported beta headers like the 1M context beta, and configuring the effort parameter across platforms including Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry.

What prompt adjustments are needed when upgrading to Claude Opus 4.5?▼

When upgrading to Claude Opus 4.5, conditional prompt adjustments may be needed to address known behavioral differences such as tool overtriggering, over-engineering, generic frontend outputs, and thinking sensitivity, applied only if you experience these specific issues.

Does the Opus 4.5 migration support AWS Bedrock and Google Vertex AI?▼

Yes, the Opus 4.5 migration fully supports AWS Bedrock and Google Vertex AI, along with Anthropic API and Azure AI Foundry, by automatically replacing outdated model strings with the correct Opus 4.5 identifiers for each specific cloud platform.

Why do I need to remove beta headers when updating to Claude Opus 4.5?▼

You need to remove deprecated beta headers, such as the 1M context beta, when updating to Claude Opus 4.5 because these flags are unsupported in the new model and leaving them can cause API errors or unexpected behavior during requests.

What is the best way to handle Claude model string updates across multiple cloud providers?▼

The best way to handle Claude model string updates across multiple cloud providers is to automate the replacement of outdated model identifiers with correct Opus 4.5 strings for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry, ensuring platform-specific syntax is matched.

When should I configure the effort parameter during Claude Opus 4.5 migration?▼

You should configure the effort parameter during Claude Opus 4.5 migration to ensure optimal model performance, as it replaces deprecated beta headers and helps calibrate the new model's behavior for your specific API integration and prompt structure.

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