Vibe Check: Fable 5.1—Anthropic Is So Back (Again)
Anthropic says the model can pursue a goal over extended runs and make better decisions about how to solve the underlying problem. Kieran’s experience supports that: Compared with Fable 5 on a task to build a clone of Every’s document editor Proof from scratch, it went deeper, added useful details he hadn’t requested, and showed better judgment about what worked.
TL;DR
- Fable 5.1 can pursue goals over extended runs.
- The model makes better decisions on how to solve problems.
- In a task to clone a document editor, Fable 5.1 showed deeper understanding and better judgment than Fable 5.
- Fable 5.1 added useful details not initially requested during the cloning task.