PostTrainBench v1.2 Released: Fable 5.1 Tops Leaderboard

PostTrainBench v1.2 puts Fable 5.1 on top with 44.6%, ahead of Claude Opus 5.5 and GPT-6 Astra. The update also adds cloud GPU support via a new Harbor adapter.

2026-10-02 ~ 2026-10-02 · 3 related posts

• PostTrainBench v1.2: Fable 5.1 takes #1 at 44.6%, Opus 5.5 second, now reproducible via Harbor — dejavucoder · 2026-10-02
• PostTrainBench v1.2 ranks Fable 5.1 > Opus 5.5 > GPT-6 Astra, adds Harbor support — maksym_andr · 2026-10-02
• PostTrainBench v1.2: Fable 5.1 tops leaderboard at 44.6%, cloud GPU support — karinanguyen · 2026-10-02