
Claude Opus 5 Prompting Guide: What to Delete From Your Prompts in 2026
Claude Opus 5 changes the prompting playbook. Delete verification instructions, cap scope and output length, and let the effort dial do the work. Here's the full guide.
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Claude Opus 5 changes the prompting playbook. Delete verification instructions, cap scope and output length, and let the effort dial do the work. Here's the full guide.

Public benchmarks like MMLU and Arena don't tell you which AI model is best for YOUR tasks. Here's how to build a custom LLM benchmark from your own work — step by step, no infra required.