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Opus 5.5 demo prompts

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Ten prompts taken verbatim from the open-source collection awesome-opus5-5-videos by yihui-dev (MIT License, (c) 2026 yihui-dev), each run once through Claude Code with Claude Opus 5.5 and once through Codex CLI with GPT-6 Sol, as agentic harness runs with real tool calls and no time or turn limit. Each prompt page links the original post. awesome-opus5-5-videos on GitHub (MIT)