# Jagged Frontier

> The pattern where AI systems are excellent at some tasks while surprisingly weak at nearby tasks.

- Category: AI-Native Product
- Stage: Rising
- Also called: Uneven capability frontier, Capability cliff
- Canonical: https://www.joelcsaji.com/ai-dictionary/jagged-frontier

## Plain English

AI capability is not a smooth line; it has cliffs and weird gaps.

## Example

A model solves competition math but fails a simple visual clock-reading task.

## Why it matters

Teams should test the exact workflow they plan to ship instead of relying on broad model reputation.

## Related

- [Evals](https://www.joelcsaji.com/ai-dictionary/evals)
- [SWE-bench](https://www.joelcsaji.com/ai-dictionary/swe-bench)
- [Human-in-the-Loop](https://www.joelcsaji.com/ai-dictionary/human-in-the-loop)

## Sources

- [Stanford HAI: 2026 AI Index](https://hai.stanford.edu/ai-index/2026-ai-index-report)