Head to head
Cline vs Aider
Which is better, Cline or Aider?
Cline finishes ahead of Aider on the index, 81.5 to 81.4, and leads on all four scores: craft, speed, control and value. Both are scored on the same rubric, in the same week, and neither placing is sponsored.
Updated
Cline
04 of 54
81.5
An open-source agent in your editor where you pay only for the model.
Aider
05 of 54
81.4
Terminal pair programming that commits as it goes, with any model you like.
The four scores, side by side
| Score | Cline | Aider | Difference |
|---|---|---|---|
| Craft | 78 | 79 | +1 |
| Speed | 78 | 78 | — |
| Control | 84 | 84 | — |
| Value | 88 | 86 | +2 |
| Index score | 81.5 | 81.4 | +0.1 |
Which to pick
Cline is the safer pick on every axis we score. Aider earns its place in the index, but nothing in these four numbers argues for it over Cline.
Cline
Cline is the honest option. The agent itself is open source and free, and your bill is whatever inference you use, which removes both the vendor margin and the lock-in, since the model choice stays yours. For developers who want an agent in their editor without renting one, this is the answer, and the size of its community suggests plenty agree. What you give up is the polish and the account management a commercial product would wrap around it.
Where it shines
- Open source, so the agent's actual behaviour is inspectable
- You pay for inference only, with no vendor margin stacked on top
- Model choice is yours, which means no lock-in later
Aider
Aider is the minimal, durable version of this idea: a terminal program that edits your files, runs your tests and commits each step so you can always walk it back. It works with whatever model you point it at, which is why it has stayed useful across several years of churn underneath. There is no interface and no onboarding; it assumes fluency and a terminal you already live in. For an existing codebase in experienced hands, that is a feature rather than a gap.
Where it shines
- Commits each step, so every change is reviewable and reversible
- Model-agnostic, which is why it has outlasted several rivals
- Very wide language coverage