Anthropic released the prompt engineering techniques for Claude 4.x models, with specific guidance for Sonnet 4.5, Haiku 4.5, and Opus 4.5

Claude 4.5 Prompting Best Practices:

  • Be clear and specific about what you want.
  • Provide relevant context or background details.
  • Set the role or objective up front (for example, “You are an expert…”).
  • Use examples to illustrate the desired output.
  • Break multi-step tasks into logical stages.

Here’s a nice little infographic which covers everything: