Dev: Anthropic 5.1 is a massive leap over previous model
doodlestein · x · 2026-09-02
A developer reported that Anthropic's new model (misnamed Fable 6, referring to 5.1) represents a massive leap over the previous version. After testing across 15+ projects for 5 hours, they found it significantly better in every way, particularly excelling at cutting through noise in complex scenarios.
More from Models
- OpenAI's 'recurrent depth' reasoning approach raises monitoring concerns — steph_palazzolo · 2026-09-02
- Fable 5.1 achieves better results at lower cost on low-effort settings — sven_ai · 2026-09-02
- OpenAI explores looped transformers to improve answers by reprocessing text — pstAsiatech · 2026-09-02
- Claude Fable 5.1 preserves prompt cache when adjusting thinking effort — brandon_galang · 2026-09-02
- Anthropic launches Mythos 5.1 with Life Sciences Verification Program — arjunrajlab · 2026-09-02
- Fable 5.1 test fails to meet expectations — Angaisb_ · 2026-09-02