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claude-opus-4-5-migration

Migrate prompts and model strings from older Claude models to Opus 4.5.

Updated Jan 29, 2026
Search Tags:#prompt engineering#migration#llm#claude#opus 4.5#api update
One-click install
npx skills add https://github.com/CuCryptos/sixroundsdeep --skill claude-opus-4-5-migration-cucryptos
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: claude-opus-4-5-migration
Source: https://github.com/CuCryptos/sixroundsdeep/tree/main/.agents/skills/claude-opus-4-5-migration
Command: npx skills add https://github.com/CuCryptos/sixroundsdeep --skill claude-opus-4-5-migration-cucryptos

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill streamlines the process of migrating prompts, code, and API calls from older Claude models (Sonnet 4.0, Sonnet 4.5, Opus 4.1) to the latest Opus 4.5, ensuring compatibility and leveraging new model capabilities.

Core Features & Use Cases

  • Model String Updates: Automatically replaces outdated model identifiers with the correct Opus 4.5 strings for various platforms (Anthropic API, AWS Bedrock, Google Vertex AI, Azure AI Foundry).
  • Prompt Adjustment Guidance: Provides specific instructions and code snippets to address known behavioral differences in Opus 4.5, such as tool overtriggering, over-engineering, code exploration conservatism, frontend design, and thinking sensitivity.
  • Use Case: A developer needs to update their application's API calls from claude-sonnet-4-20250514 to claude-opus-4-5-20251101 and wants to ensure their prompts are optimized for the new model's behavior.

Quick Start

Use the claude-opus-4-5-migration skill to update model strings in the codebase from Sonnet 4.0 to Opus 4.5.

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 prompts from Sonnet 4.5 to Opus 4.5?▼

Claude Opus 4.5 migration involves replacing outdated model identifiers with correct strings for Anthropic API, AWS Bedrock, Google Vertex AI, and Azure AI Foundry, then adjusting prompts to address behavioral differences like tool overtriggering and over-engineering.

What behavioral differences require prompt adjustment when upgrading to Claude Opus 4.5?▼

Upgrading to Claude Opus 4.5 requires adjusting prompts to address tool overtriggering, over-engineering, code exploration conservatism, frontend design preferences, and thinking sensitivity using specific XML-tagged snippet integrations.

How do I update API calls from Sonnet 4.0 to Opus 4.5 across AWS Bedrock and Google Vertex AI?▼

Updating API calls to Opus 4.5 requires replacing older model identifiers, such as claude-sonnet-4-20250514, with the correct Opus 4.5 strings across AWS Bedrock, Google Vertex AI, Azure AI Foundry, and the Anthropic API.

Does migrating to Claude Opus 4.5 require changing how prompts are structured?▼

Migrating to Opus 4.5 requires carefully integrating provided behavioral adjustment snippets into existing prompts using XML tags to mitigate known issues like code exploration conservatism and thinking sensitivity.

Why does Opus 4.5 overtrigger tools and how do I fix it during migration?▼

Opus 4.5 exhibits tool overtriggering as a known behavioral difference; you fix it during migration by integrating specific guidance snippets into your existing prompts using XML tags to constrain the behavior.

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