You’re probably prompting Claude Opus 5 completely wrong, and it’s quietly draining your time, patience, and API tokens. The old "step-by-step" prompting advice from last year is officially dead—if you want to get actual work done today, you need to stop micromanaging your models.

We’ll talk about:

The Opus 5 Shift: The 5 new rules for modern prompt engineering, and why giving the AI the entire job upfront absolutely crushes the old breadcrumb method.
The "Double-Check" Trap: Why telling your model to "review its work twice" is now a massive waste of tokens, and how to define "good" instead.
Navigating the 2026 Lineup: How to pick between Haiku, Sonnet, Opus 5, and the elusive Fable 5, plus the real truth about Claude's new "Effort Level" sliders.
The 3-Minute Website: A practical teardown of how to generate a full, production-ready landing page inside Claude Design by ruthlessly limiting the AI's "work product" and stopping the dreaded wall-of-text response.

Keywords: Claude Opus 5, Anthropic, Fable 5, prompt engineering, token efficiency, Claude Design, AI workflow, LLM effort levels, Vibe Coding, AI web design, AI agent limits.

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#78 Robin: Stop Babysitting Your AI - 5 New Rules for Prompting Claude Opus 5 and Beating Fable 5

AI Fire Daily

#78 Robin: Stop Babysitting Your AI - 5 New Rules for Prompting Claude Opus 5 and Beating Fable 5