Frontier AI gains steady +16.5 ECI/year, Anthropic's Fable 5.2 takes the lead
sebkrier · x · 2026-11-11
Ramez Naam's thread, based on an Epoch AI Nov 2026 snapshot chart, argues frontier AI progress has been steady rather than accelerating: ECI improves at a consistent +16.48 points/year, with Anthropic's Fable 5.2 (174.24) slightly above trend. The big shift is leadership changing hands — after OpenAI and brief Google Gemini leads, Anthropic's Fable 5/5.1/5.2 series has taken the frontier lead.
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