ECI capability curve flattens as frontier model gains slow
quadriphasic · reddit · 2026-10-25
A Reddit user's improved chart of the Epoch Capabilities Index shows frontier models (GPT-5.5 Pro, GPT-6 Astra, Claude Fable 5.1, Gemini 3 Pro) clustering in the 150-168 range with the fitted curve visibly flattening since 2026, suggesting a slowdown in frontier capability gains after years of rapid growth.
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