Developer kalomaze calls Opus 5 a bad model

Prominent open-source developer kalomaze harshly criticized Anthropic's new Opus 5, saying it rashly presents hypotheses as proven facts, a flaw he notes is especially common in smaller models with strong pretraining priors.

2026-09-13 ~ 2026-09-13 · 2 related posts

• kalomaze: Opus 5 is "such a bad model" — kalomaze · 2026-09-13
• Smaller AI models assert hypotheses as proven facts and ignore evidence already in tool calls — kalomaze · 2026-09-13