Cline vs Cursor: the bill is the whole difference
Cursor bundles the model into a subscription. Cline is free and bills you per token. Same work, wildly different invoices -- and which is cheaper depends entirely on how you use it.
Both are agentic coding tools that read your repo, edit files, and run commands. The functional gap between them is smaller than the discourse suggests. The billing gap is enormous, and it runs in both directions depending on how you work.
The structural difference
Cursor is an editor with the model included. You pay a subscription, you get an allowance of premium requests, and when it runs out you move to a slower queue. Cost is predictable; capacity is capped.
Cline is a free VS Code extension with no model. You supply the backend, and it bills whatever that backend charges. Cost is uncapped; capacity is whatever you are willing to pay for.
That is the entire thing. Everything people argue about downstream follows from it.
Why Cline gets called expensive
It is not the extension -- that costs nothing. It is that an agent with no allowance to protect will happily consume tokens, and a metered API charges for every one.
The mechanism is context resending. Each step in an agent loop resends the accumulated conversation: the files it read, the output of the commands it ran, its own previous reasoning. A twenty-step task does not send twenty small requests, it sends twenty progressively larger ones. On a frontier model at $3 per million input tokens, a long autonomous run is genuinely expensive.
Cursor does not have this problem visible to you because the allowance absorbs it. You feel it as "I ran out of fast requests" instead of as a number on an invoice.
Why Cursor gets called limiting
The flip side. When the allowance is gone you are in the slow pool, which is demand-driven rather than time-driven -- it can be slow all evening. There is no way to pay your way out mid-session, because plan changes generally apply from the next cycle.
For someone using an agent occasionally, this never happens. For someone using it as their primary interface all day, it happens every month.
Which is cheaper, concretely
It depends on one thing: whether your usage is above or below the subscription's break-even.
Below it -- a few agent sessions a week, mostly short -- Cline on a cheap backend costs less than a subscription. DeepSeek-class models run about $0.14 per million input tokens, and light use lands in low single-digit dollars.
Above it -- agent running most of the working day -- the subscription is the better deal, because a flat fee beats metered tokens once volume is high. This is the case people forget when they recommend Cline as the cheap option.
The exception that beats both: using access you have already paid for. A Copilot subscription includes Claude and GPT-5 model access. If you point Cline at that instead of a metered API, you get the uncapped tool on a flat fee you were already paying. That combination is cheaper than either tool alone.
The other real differences
Polish. Cursor is a more finished product. Tab completion, the inline diff experience, the general feel of it. That is worth money and pretending otherwise is silly.
Where requests go. Cursor routes through its own servers, so a localhost endpoint is unreachable and you need a tunnel or cloud URL. Cline runs entirely in your editor and can talk to anything on your machine. If you want a local router or a local model, this decides it outright.
Model choice. Cline lets you point at any model, including ones no subscription offers. Cursor gives you its menu.
Transparency. Cline shows you the token count and cost per step. Cursor shows you a request counter. The first teaches you where your money goes; the second is easier to ignore.
Practical setup for either
If you use Cline, do not point it at one metered API and hope. Put a router in front so free tiers and existing subscriptions absorb the volume:
npm install -g @sifxprime/krouter
krouter -tSet Cline's base URL to http://localhost:20128/v1. Connect a subscription you already hold, a free tier, and a cheap API as the last resort. Most agent traffic is routine, and routine traffic should not hit your most expensive backend.
For Cursor the same idea applies but the endpoint must be reachable from their servers, so localhost will not do.
Choosing
| If | Then |
|---|---|
| You want the most polished experience | Cursor |
| You use an agent all day, every day | Cursor, or Cline on a subscription backend |
| You use an agent occasionally | Cline on a cheap API |
| You want a local model or local router | Cline |
| You already pay for Copilot | Cline pointed at it |
| You want a predictable monthly number | Cursor |
Common questions
Is Cline actually free?
The extension is free and open source. The model is not, and that is where every "my Cline bill was $200" story comes from.
Is Cline better than Cursor?
Neither is better in general. Cursor is more polished; Cline is more flexible and can reach backends Cursor cannot. The choice follows from how you pay and where your requests are allowed to go.
Can I use Cursor with my own API key?
Yes, for OpenAI-compatible providers -- but requests route through Cursor's servers, so the endpoint must be publicly reachable. A local router will not work without a tunnel.
Why is my Cline bill so high?
Almost always context resending on a frontier model. Each agent step resends the accumulated conversation, so cost grows through a long task. Routing routine steps to a cheaper backend is the fix.
Can I use both?
Yes, and plenty of people do -- Cursor for interactive editing, Cline for long autonomous runs on a cheaper backend. They are not mutually exclusive.
Related
Klaw is the Kodelyth AI agent. He writes drafts, runs the benchmarks, and tracks every cost number in this post live through kRouter. Humans review before publish.
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