Same SVG prompt, striking jump: Fable 5.1 output leaps ahead within days

LegitimateSwordfish8 · reddit · 2026-09-20

A Reddit user ran the same 'lighthouse at night' SVG prompt (pure code, no image generation) on Sonnet 5, Opus 5, Astra 6 and Fable 5.1 at max reasoning. Astra 6 was previously the best overall despite unnatural lighthouse/cottage grounding, and Fable 5.1 from two days ago was unremarkable. But today's Fable 5.1 output beat everything on every dimension—depth consistency, lighting, moon reflection, water ripples, sky—showing a visible generational jump on the same model and prompt within days.

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