Aider vs Cline: Which AI Agent Is Better?
An in-depth comparison of Aider and Cline across output quality, autonomy, reliability, speed, value, and ease of use. Vote for your favorite.
An in-depth comparison of Aider and Cline across output quality, autonomy, reliability, speed, value, and ease of use. Vote for your favorite.
Either way, you pay for the model calls. A median coding-agent day on our gateway is 95 requests and 8.6 million tokens. The table prices every step at one model’s rate.
Both run on Standard Compute, where each step goes to the cheapest model that can do it: routine steps go to efficient open models, hard ones to frontier models such as Claude Fable 5.1 or GPT-6 Astra.
| Model | Typical day | Busy day |
|---|---|---|
| Claude Opus 5.5 | $7.34 | $59.10 |
| Claude Sonnet 5.5 | $3.67 | $29.55 |
| GPT-6 Luna | $0.23 | $2.43 |
Fixed monthly plans from $19. Eligible new accounts can try $0.25 of compute first, no card. Trial terms
Pick a winner in each category. You can change your vote anytime.
AiderClineChoose Aider if you are developers who want a flexible, BYO-model terminal coding tool. Choose Cline if you are developers who want a powerful, safety-gated agent inside the editor they already use.
Editorially this matchup is a dead heat: each agent leads in 2 of our six categories. On price, Aider runs free (byo api key) and is open source; Cline runs free (byo api key) and is open source.
What it costs to run Aider or Cline
Best API for Aider →
5 options compared, with prices and limits
Best API for Cline →
5 options compared, with prices and limits
Standard Compute sends each step to the cheapest model that can do it, on providers we vet for price, uptime and speed. Plans start at $19 a month, and eligible new accounts can try $0.25 of compute with no card. Choose your agent below to connect.
See the trial and activation steps →
More on Cline: How do I use DeepSeek in Cline? · Is there a flat-rate API for Cline?
Aider is an open-source (Apache 2.0) AI pair programming tool that works in your terminal. It can edit multiple files, understand your git history, create commits, and works with virtually any LLM via API. It earned its reputation with a practical approach to real-world coding tasks and strong benchmark scores, but development has gone quiet: the last release was 0.86.2 in February 2026 and the last commit came in May 2026.
Cline is the open-source coding agent that defined the in-editor agent category, with 11M+ installs across VS Code, JetBrains, Cursor, its CLI and a new desktop app. Its Plan/Act modes separate thinking from doing: the agent proposes a plan you approve before it touches files or runs commands. Apache-2.0 licensed with full bring-your-own-key model freedom, MCP integration, and deployment options up to on-prem and air-gapped for enterprises.
Aider and Cline both run on Standard Compute
