All harnesses
Cline
Cline Bot
Cline is the most-installed open-source coding agent for VS Code. Its plan-and-act loop asks for explicit human approval on each tool use by default, which makes it slower than fully autonomous harnesses but easier to trust. Bring-your-own-key means the baseline cost of running Cline is whatever your model provider charges.
Type
ide
License
Open source
Model story
Multi-model, BYOK
Vendor
Cline Bot
Leaderboard Placements
| Benchmark | Best base model | Score | Rank |
|---|---|---|---|
| SWE-bench Verified | Claude Sonnet 4.6 | 63.4 | #11 / 15 |
| Terminal-Bench | — | — | — |
| Aider Polyglot | — | — | — |
| SWE-Lancer | — | — | — |
Distribution
Open-source VS Code extension. Apache 2.0 license. Available on the marketplace.
Model Story
Multi-model. Claude, GPT, Gemini, DeepSeek, and any OpenAI-compatible endpoint. Bring your own key.
Pricing
Free harness; you pay for the underlying API tokens directly to your model provider.
Who It's For
Developers who want a transparent, free-to-install agent in VS Code with manual approval for every tool call.
Notable Features
- Plan and Act modes with explicit approval
- MCP server support
- Auto-approve list for trusted tools
- Browser automation
- Bring-your-own-key (no Cline-side billing)
Vendor site for Cline:https://cline.bot