Cline vs Continue: Open-Source AI Coding Extensions Compared

#The Open-Source Contenders

If you want AI coding assistance without paying Cursor $20/month or worrying about where your code goes, Cline and Continue are your best options. Both are fully open-source, support bring-your-own-key, and run any model you want.

But they solve different problems. Cline evolved from Claude Dev and focuses on agentic capabilities—letting AI execute multi-step tasks autonomously. Continue focuses on being the best possible AI autocomplete and chat experience.

#My Take

I’ve used both extensively. Here’s the real story:

Cline surprised me. I expected a Claude-specific tool but it works great with GPT-4 and even local models. The cost tracking is genuinely useful—I’ve caught myself about to approve a $3 operation that I thought would cost $0.30. The agentic mode is powerful but requires trust; I only enable it for projects where I can review changes.

Continue is my daily driver for autocomplete. It’s faster than Cline’s completions and the customization is deep. I have different models configured for different tasks—fast local model for completions, Claude for chat, GPT-4 for explanations. The learning curve is steeper but worth it.

My setup: Continue for autocomplete (always on), Cline for when I need an agent to handle complex tasks.

#Core Philosophy

#Cline: The Autonomous Agent

Cline wants to be your AI employee. Give it a task, and it:

• Creates and edits files
• Runs terminal commands
• Opens URLs and interacts with web pages
• Reads and processes images
• Reports progress and asks permission at key points

The “approve each step” workflow keeps you in control while letting AI handle tedious multi-step work.

#Continue: The Enhanced Copilot

Continue wants to supercharge your existing workflow. It provides:

• Intelligent autocomplete (inline suggestions)
• Chat interface for questions
• Context-aware code generation
• Highly configurable everything

Less autonomous, more collaborative. AI assists; you drive.

#Feature Deep Dive

#Agentic Capabilities

This is Cline’s killer feature.

Cline can:

Task: "Set up a new Express API with TypeScript, add user authentication using Passport.js, and create unit tests"

Cline will:
1. Create project structure
2. Initialize package.json
3. Install dependencies (asks permission)
4. Create TypeScript config
5. Write Express routes
6. Implement Passport authentication
7. Write Jest tests
8. Run tests (asks permission)

Each step requires your approval (or you can enable auto-approve for trusted operations).

Continue doesn’t have autonomous agents. You use chat to generate code, then manually apply it. More control, less automation.

#Autocomplete Quality

Continue excels here:

• Faster suggestion latency
• Multi-line completions
• Configurable triggers
• Different models for completion vs chat
• Works great with fast local models

Cline has autocomplete but it’s secondary:

• Adequate but not best-in-class
• Same model for completion and chat
• Less configuration options

For pure autocomplete, Continue wins.

#Cost Tracking

Cline shows real-time costs:

• Per-request cost display
• Running total in session
• Cost estimate before expensive operations
• Historical usage tracking

This is invaluable for API-based usage. You always know what you’re spending.

Continue has basic token counting but no dollar amounts. You need to track costs manually.

#Model Support

Both support everything:

Continue has slightly better local model support with more presets and optimizations for Ollama.

#IDE Support

If you use JetBrains, Continue is your only option here.

#Customization

Continue is more configurable:

// config.json - Continue configuration
{
  "models": [
    {
      "title": "Claude for Chat",
      "provider": "anthropic",
      "model": "claude-3-5-sonnet"
    },
    {
      "title": "Local for Completions",
      "provider": "ollama",
      "model": "codellama"
    }
  ],
  "tabAutocompleteModel": {
    "provider": "ollama",
    "model": "starcoder2"
  },
  "slashCommands": [
    {
      "name": "test",
      "description": "Write unit tests"
    }
  ]
}

Custom slash commands, context providers, and model routing make Continue highly adaptable.

Cline is simpler:

• Model selection
• Permission settings
• Custom instructions
• That’s mostly it

Simplicity is a feature if you don’t want to configure things.

#Workflow Comparison

#Cline Workflow: Task Delegation

You: "Add pagination to the users API endpoint"

Cline: I'll add pagination to the users endpoint. Here's my plan:
1. Modify GET /users to accept page and limit params
2. Update the database query
3. Add pagination metadata to response
4. Update tests

Should I proceed?

You: Yes

Cline: [Creates file changes, shows diff]
File: src/routes/users.js
+ const page = parseInt(req.query.page) || 1;
+ const limit = parseInt(req.query.limit) || 20;
...

Apply these changes? (Cost: $0.03)

#Continue Workflow: Assisted Coding

You: /edit add pagination to the users API

Continue: Here's the pagination implementation:
[shows code block]

You: [click to apply to file]
[manual review]
[accept or modify]

Same result, different process. Cline is more autonomous; Continue keeps you closer to the code.

#Privacy & Security

Both are excellent for privacy:

Your code goes directly to your chosen AI provider (or nowhere if using local models). Neither extension collects telemetry on your code.

#Performance

Continue feels faster:

• Autocomplete latency is lower
• Chat responses stream smoothly
• Extension doesn’t slow VS Code

Cline has occasional lag:

• Complex agentic tasks need processing
• Permission dialogs add interaction overhead
• Extension is heavier overall

For snappy day-to-day coding, Continue has the edge.

#Who Should Choose Cline

Cline is your tool if:

• You want AI to handle multi-step tasks autonomously
• Cost tracking is important (API budgets)
• You prefer “approve/deny” workflow over manual coding
• Terminal and browser automation appeals to you
• You’re comfortable with an agent making changes

#Who Should Choose Continue

Continue is your tool if:

• Autocomplete speed and quality are priorities
• You want deep customization options
• You use JetBrains IDEs
• Local model performance matters
• You prefer staying closer to the code

#The Verdict

These extensions solve different problems within the open-source AI coding space.

Cline is the autonomous agent. It’s best when you have a well-defined task and want AI to handle the implementation with your oversight. The cost tracking is a genuine differentiator—no other tool makes API costs this visible.

Continue is the enhanced coding companion. It’s best when you want AI assistance integrated smoothly into your existing workflow without taking over. The autocomplete and customization are best-in-class.

Most power users end up running both:

• Continue for always-on autocomplete
• Cline for when you need to delegate a complex task

They complement each other well. Try both and see which workflow resonates with how you code.