Anthropic's official Opus 5 prompting guide: https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-opus-5

Claude Opus 5 needs a different prompting style than earlier Claude models. This video breaks down the right model and effort setting, five official prompting rules, and a real Claude Design test.

0:00 Intro
0:44 Which Claude Model Should You Use?
2:36 Choosing the Right Effort Level
3:40 Building the Prompt
4:14 Rule 1
5:21 Rule 2
6:04 Rules 3 and 4
7:59 Rule 5
9:18 Testing the Finished Prompt

Anthropic Just Revealed How to Prompt Opus 5