Model Releases
but but i thought it was magic?
but but i thought it was magic? What we learned testing Claude Fable/Mythos 5 on Vending-Bench: > Performance: Makes less money than Opus 4.7 and GPT-5.5 > Alignment: A step back. (Opus 4.8 was better
but but i thought it was magic? What we learned testing Claude Fable/Mythos 5 on Vending-Bench: > Performance: Makes less money than Opus 4.7 and GPT-5.5 > Alignment: A step back. (Opus 4.8 was better, but we're back to Opus 4.6/4.7 behavior) > It rationalizes its bad actions and has a weird moral boundary
Source: Gary Marcus (X) | 2026-06-09