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Cline

Open-source coding agent for your IDE, bring-your-own-model

Last verified Jul 22, 2026 · Quality-gated
Quality score 84/100
AI-generated · quality-gated

Overview

Cline is an open-source AI coding agent that plans and executes code changes inside the IDE using a bring-your-own-model approach.

Review

Cline Review: Free Open-Source Agent, But You Pay Per Token

Cline is a free, open-source VS Code coding agent that lets you bring your own model API key rather than locking you into one provider's fixed pricing.

What Cline actually is

Cline is a free, open-source coding agent that runs inside VS Code and other IDEs. The extension itself costs nothing to install - you pay only for the model/token usage you generate while using it (Cline pricing). It's licensed under Apache 2.0 and works on a bring-your-own-key (BYOK) model: you connect your own API key to a provider and pay that provider directly, not Cline.

Supported models

Officially, Cline supports Anthropic Claude, OpenAI, Google Gemini, OpenRouter, and local models via Ollama, plus generic OpenAI-compatible endpoints (Cline FAQ). Secondary sources also mention Bedrock, Vertex AI, DeepSeek, Mistral, and xAI - these are reported, not confirmed on Cline's own pages, so treat that broader list as likely-but-unverified.

Core features

  • Plan vs Act modes - separates planning/reasoning from actual code execution
  • Multi-file editing - edits across a codebase, not just single-file autocomplete
  • Terminal command execution - can run shell commands as part of a task
  • MCP (Model Context Protocol) support - connects to external tools/data sources
  • User-approved changes and checkpoints - you review and approve edits rather than have them applied silently

What it costs in practice

Because you pay model providers directly, actual monthly spend depends entirely on which model you pick and how much you use it. Publisher-reported estimates (not official, and not guaranteed) put typical usage at roughly:

  • ~$5–15/month for light use
  • ~$25–70/month for moderate use
  • ~$100–200+/month for heavy use

These are reported ranges from secondary sources, not numbers Cline publishes as commitments - your actual bill will vary by model choice, prompt size, and codebase size.

A centralized-billing "Teams" option is mentioned by one secondary source, but this is unconfirmed on Cline's official pricing or FAQ pages as of 2026-07-22 - don't assume it exists or budget around it without verifying directly with Cline.

Where it struggles

  • Cost unpredictability - unlike flat-fee tools, your spend scales with token usage, and heavy agentic workflows (multi-file edits, long conversations) can burn tokens fast
  • Context-window pressure - large codebases can hit model context limits, requiring more careful prompting or chunking
  • Setup and learning curve - configuring API keys, choosing a provider, and understanding Plan/Act modes takes more upfront effort than tools like GitHub Copilot or Cursor that ship with a single built-in model and fixed pricing

Sources

Pros
  • Extension is free and open source (Apache 2.0), with no vendor lock-in on which AI model you use
  • Supports multiple official providers (Claude, OpenAI, Gemini, OpenRouter, Ollama) plus OpenAI-compatible endpoints
  • Plan vs Act modes, multi-file editing, terminal execution, and MCP support cover real agentic coding workflows, not just autocomplete
  • User-approved changes and checkpoints give you a review step before edits are applied
Cons
  • Token-based billing means monthly cost is unpredictable and scales with usage, unlike flat-fee competitors
  • Requires manually configuring API keys and choosing/understanding a model provider, adding setup time versus turnkey tools
  • Large codebases can hit model context-window limits, requiring extra prompting effort or task chunking
  • A centralized Teams billing option is mentioned only by secondary sources and is unconfirmed on Cline's official pages
Best for
Developers who want a model-agnostic coding agent instead of being locked to one vendor
Teams comfortable managing their own API keys and monitoring token spend
Engineers who want to run local models via Ollama for privacy or cost control
Open-source contributors who want to inspect or modify the agent's source (Apache 2.0)
Verdict Choose Cline if you want an open-source, model-agnostic coding agent and are willing to manage API keys and variable token costs in exchange for flexibility across Claude, GPT, Gemini, or local models. Skip it if you want predictable flat-rate pricing, minimal setup, or a single vendor-managed experience - tools with fixed subscriptions will be simpler and more budget-predictable for that use case.