The fastest way to the open-source ai coding agent that lives in your vscode.

Cline is the open-source AI coding agent that exploded in 2025. It runs as a VSCode extension, calls any frontier model (Claude, GPT-4, Gemini, DeepSeek, local LLMs) on your behalf, executes shell commands, edits files, and even drives a browser. If Cursor is the polished iPhone, Cline is the Linux terminal — more powerful, less hand-holding, completely free.

Who it's for: Software engineers who want full control over model choice, data privacy, and cost. Ideal for backend, devops, and security-sensitive work. Power users who don't mind a steeper learning curve than Cursor.

Key features

Plan/Act modes Two-stage execution

Cline plans first, then acts. You see exactly what files it will touch, what commands it will run, and approve before any change. No "magic" edits you didn't see.

Multi-model Any frontier LLM

Switch between Claude Sonnet 4.5, GPT-4.1, Gemini 2.5, DeepSeek, or your own local Ollama model. Best model for the job, not vendor lock-in.

Terminal & browser Real side effects

Cline runs npm install, deploys to Vercel, opens a Chrome browser to test your app, queries your Postgres DB. Not just text suggestions.

Bring-your-own-key Pay per token

No $20/mo Cursor subscription. You pay OpenRouter, Anthropic, or your local GPU. Heavy users save $200+/year.

The honest take

✓ What works

Truly free — no subscription, no markup on tokens
Works with any model including local Ollama
Plan/Act mode is more transparent than Cursor Composer
Active open-source community (40K+ GitHub stars)
Full MCP (Model Context Protocol) support

✗ What doesn't

Setup friction — you need API keys for each model
No native multi-file Composer equivalent (works around it)
UI is functional, not pretty
No built-in background agents (need to keep VSCode open)
Some users find the "approval" prompts tedious for long sessions

Verdict

If you're technical, Cline is the best AI coding tool of 2026 — and it's free. If you want a turnkey experience and don't mind paying $20/mo, Cursor is still smoother. Many serious devs use both.

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