Cline
The leading open-source autonomous coding agent for VS Code with human-in-the-loop permission controls.
Overview & Analysis
Cline (formerly Claude Dev) is an autonomous software engineering assistant that runs inside standard VS Code. Open-sourced under the Apache 2.0 license, Cline creates files, edits code, executes terminal commands, and browses live web applications while requiring user confirmation for every potentially disruptive action.
Pricing Model: 100% Free & Open Source (Apache 2.0). Pay model providers directly via API key (BYOK).
Free Tier Details: Extension is completely free. Works with free local models via Ollama or LM Studio.
Technical Specs & Models
Key Capabilities & Features
Specialized engineering mechanisms implemented in Cline.
Human-in-the-Loop Permission Gates
Granular controls let you approve or reject file changes, shell commands, and browser clicks on a per-action basis.
Model Context Protocol (MCP) Integration
Connect custom tools and data servers like databases, Figma, GitHub APIs, and web scrapers directly into the agent.
Local LLM Compatibility
Run offline completely for free by connecting to Ollama, LM Studio, or vLLM endpoints.
Real-Time Token & Cost Telemetry
Monitors input/output tokens and exact dollar cost live for every single prompt turn.
Pros & Cons Evaluation
Forensic analysis of developer experience, cost efficiency, and trade-offs.
- 100% open-source with 25,000+ GitHub stars and zero vendor lock-in
- Operates directly inside standard VS Code without requiring a proprietary editor fork
- Supports Bring-Your-Own-Key across Anthropic, OpenRouter, DeepSeek, and local Ollama
- Granular permission approvals prevent unintended terminal commands or data loss
- No bundled cloud subscription: developers must provide their own API keys
- Approval gates can feel repetitive for users who prefer full hands-off autonomy
Pricing Plans & Tiers
Subscription plans, credit quotas, and commercial deployment options.
Open Source
Free forever, open-source under Apache 2.0
- All features included
- Unlimited usage
- BYOK support for all models
- Offline local LLM support via Ollama
- MCP server support
Verified Benchmark Evaluations
Standardized evaluation scores recorded on SWE-bench and synthetic code harnesses.
| Benchmark Harness | Score / Accuracy | Evaluation Metric | Verification Status | Evaluation Notes |
|---|---|---|---|---|
| DeepSWE v1.1 | 66.8% | Task Completion | Verified | Standard benchmark instance run. |
| SWE-Atlas | 75.5% | Reasoning Pass Rate | Verified | Standard benchmark instance run. |
| Terminal-Bench 4.0 | 63.8% | Tool Calling | Verified | Standard benchmark instance run. |
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