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Jack Roberts

Hands on AI tooling from a startup builder. Head to head model tests with real costs, real timings, and the skills he gives away.

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16:44
Jack Roberts

I tested Claude Design vs Kimi K3. What you need to know

A three round bake off between Claude Fable 5 and Kimi K3, both running inside the same Claude Code harness with Kimi piped in through an OpenRouter API key, so the model is the only variable. The rounds are a self running narrated HTML slide deck, a one shot travel dashboard, and a full client grade website built from a design skill he publishes free. Every round carries stated numbers: $35 against $10.70 on the deck, 8.9 minutes against 25 on the dashboard, and 67.8 minutes and $19.32 on the website against an estimated $80 plus on Fable 5. He also wires Fish Audio into both models so the decks narrate themselves, clones his own voice from a 15 second sample, and hits the one request Fable 5 refuses outright. His conclusion is a routing rule rather than a winner: spend the Claude subscription on Fable 5 first, switch to Kimi K3 when you are paying per token, and note that Kimi's extra token appetite eats into the headline 30% price.

AIBusinessDevOpsJul 22, 2026