I gave Fable 5.1, Fable 5, Claude Opus 5 and Codex the exact same prompt

Build an interactive japanese koi pond. The results surprised me. Fable 5.1 was the clear winner. The water, ripples and overall motion looked noticeably more realistic, but it did cost more than Fable 5:

DubibubiSep 21

1,001 very messy rows in a CSV file.

A single prompt with clear rules for how to handle issues. Two AI agents: claudeai with Opus 5 vs. opencode with GPT-5.6 Luna (via OpenRouter). Neither followed the instructions perfectly. One got a perfect score.

WhalesyncSep 2

Opus 5 vs Fable 5 vs Fable 5.1

Compare with same prompt ・Opus outputs “Claude-like = AI-like” ・Fable 5 also feels like a document ・Fable 5.1 is established as an illustrated animation Especially the middle to second half👀

GENEL | リアルなAI動画制作Sep 28

Claude design + opus 5 can now build animated, award style websites.

And someone just dropped an 7 minute tutorial showing exactly how to do it.

David ChSep 21