GPT-6 Astra tops Epoch Capabilities Index but Claude Fable 5.1 still leads software engineering
Jsevillamol · x · 2026-09-17
Epoch AI's latest Capabilities Index (ECI) shows GPT-6 Astra taking the overall lead ahead of rivals like Claude Fable 5.1, with its Math-ECI score setting a new record.
- On software engineering benchmarks, however, Claude Fable 5.1 remains state-of-the-art; Astra is not clearly ahead there and may even trail.
- Reposter Alex Barry agrees with that profile: clearly ahead in math/reasoning/game playing, but not clearly ahead in software engineering.
Related event: GPT-6 Astra Tops Epoch Capabilities Index Despite Score Revision(2 posts)→
More from Models
- AWS's open-source Strands Harness claims 45% cheaper than Claude Code, reigniting harness debate — blaizedsouza · 2026-11-02
- Yacine calls Terra High 'kind of an insane model' — yacineMTB · 2026-11-02
- Running DeepSeek V4.1 on a single H200 at $5.30/hr — daluoseo · 2026-11-02
- Leaked Fable 5.5 checkpoint video called 'pure code' — 'will change the game' — kimmonismus · 2026-11-02
- Claude Opus 5.5 quality complaints spark debate on why continual learning is so hard — JeremyNguyenPhD · 2026-11-02
- Why is AI sexist? Reddit debate on models overlooking Iceland's women's strike — Mathemodel · 2026-11-02