Claude Fable 5.2 tops Epoch Capabilities Index as a clear outlier

Claude Fable 5.2 has topped the Epoch Capabilities Index with a score of 173, standing out as an outlier about 1.7 months ahead of the model trend line. Analysis also suggests OpenAI models overall benefit from math and science data.

2026-11-15 ~ 2026-11-16 · 3 related posts

• Claude Fable 5.2 tops Epoch Capabilities Index at 173, speculation mounts on OpenAI's next model — haider1 · 2026-11-15
• 'Claude Fable 5.2' tops Epoch Capabilities Index at 173 — 'I swear I didn't touch it' — scaling01 · 2026-11-16
• Claude Fable 5.2 runs 1.7 months ahead of capability trend, analysis shows — peterwildeford · 2026-11-16