A developer compared the coding capabilities of Anthropic's Fable 5, Opus 4.8, and Sonnet 5 models by building the same expense tracker application with each. Fable 5 emerged as the top performer, followed by Opus 4.8, while Sonnet 5, the new free default, lagged behind. The comparison utilized a detailed client specification and a consistent tech stack including React, Vite, TypeScript, Tailwind CSS, and Supabase. AI
IMPACT Provides insights into the relative coding performance of Anthropic's models, guiding developer choices.
RANK_REASON Developer comparison of existing models, not a new release or research paper.
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