Claude Fable 5 reviews feel like Karpathy

The software engineering bottleneck is rapidly shifting from code generation to code review, and while agentic models like Fable 5 make automated review incredibly compelling, they also raise the stakes for human oversight and security.

* Fable 5's repo-level comprehension represents a massive leap forward, allowing it to spot cross-file dependency bugs that typical LLMs miss.

* This capability creates a risk of "review fatigue," where developers trust polished-looking AI pull requests without sufficient verification.

* The high cost and token consumption of Mythos-class models will likely drive a hybrid approach, using cheaper models for writing code and Fable 5 exclusively for final gatekeeping.