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Official Anthropic Opus 5.5 Prompting Guide

Anthropic published its official prompting guide for Opus 5.5 — use medium effort by default.

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About AI9

AI9 is an all-in-one AI creative platform operated by AI Hub Limited (Hong Kong). The platform provides AI image generation, AI video generation, prompt engineering tools, a creative resource marketplace, and professional AI services for creators and businesses worldwide.

Why AI9 requests Google account access: AI9 uses Google Sign-In solely to create and authenticate your account. We request your email address, display name, and profile picture to set up your AI9 profile. We do not access your Google Drive, Gmail, contacts, or any other Google services. Your data is never sold or used for advertising.

For full details on how your data is used, see our Privacy Policy and Data & Privacy page.

Official Anthropic Opus 5.5 Prompting Guide

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