GPT-6 Astra dethrones Gemini 3.8 Flash as the best vision model in side-by-side tests

Roger_M_Taylor · x · 2026-09-13

Piotr Skalski shares a side-by-side testing setup for Gemini 3.8 Flash and GPT-6 Astra, declaring "Gemini dethroned." He calls GPT-6 Astra the best vision model he has seen: notices tiny details, draws conclusions, produces precise tight bounding boxes, reads text across contexts, broad knowledge, fast — but expensive. Includes a deep-dive on its detection capabilities.

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