Frontend design test ranks Opus 5.5 first, GPT-6 Sol last

Testing four models on the same kanban app prompt, the author ranks Opus 5.5 first, Astra and Fable 5.1 tied, and GPT-6 Sol last for frontend design.

Federico Viticci

@viticciArchived 2026.09.24Originally posted 2026.09.23

Frontend design test ranks Opus 5.5 first, GPT-6 Sol last (image 1 of 4)

Frontend design test ranks Opus 5.5 first, GPT-6 Sol last (image 2 of 4)

Frontend design test ranks Opus 5.5 first, GPT-6 Sol last (image 3 of 4)

Frontend design test ranks Opus 5.5 first, GPT-6 Sol last (image 4 of 4)

Federico Viticci @viticciOriginally posted 2026.09.23

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Opus 5.5 vs. GPT-6-Sol vs. Fable 5.1 vs. GPT-6-Astra Which one did best at frontend design? The prompt: "Make me a modern kanban web app for my Hermes Agent's kanban mode" I'd rank Opus 5.5 first, then Astra and Fable tied, Sol last.

x.com/viticci/status/2102761188237168789Archived 2026.09.24 10:04

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