System PromptAdvancedScore 91

Prompting Claude Fable 5

Prompt example extracted from Anthropic Prompt Library.

ClaudeGPT-5Gemini

Prompt

Your prompt

Prompting Claude Fable 5
. It covers the behavioral differences from Claude Opus 4.8 and the prompt and scaffolding changes worth making, including effort levels, instruction following, long-run progress claims, memory systems, and the 
reasoning_extraction
 refusal category.

