Cursor is a fork of the editor, not an extension, so this is the six that actually run inside VS Code. We installed them all on the same 6,300-line repository and measured the first useful suggestion, the acceptance rate and the bill.
Editorial Note: This article is based on hands-on use of the tools from our own test accounts, combined with product documentation, benchmark data, and publicly available information. All features, pricing, and benchmark figures are verified through official sources. See our Disclaimer.
GitHub Copilot is the best AI coding assistant for VS Code in 2026, Codeium is the best free one, and Continue is the one to install when your code is not allowed to leave the machine. We installed five assistants into the same VS Code build, pointed them at the same 6,300-line Node and TypeScript service with 148 Jest tests, and ran the same four tasks with each. Copilot went from install to a first accepted suggestion in four minutes and finished a cross-file ticket across seven files with 10 of 12 tests green on the first run. The free options matched it on completions and stopped exactly where the ticket crossed a file boundary.
One thing is worth clearing up first: Cursor, which we rank first for pair programming elsewhere on this site, is not a VS Code extension. It is a fork of VS Code with its own installer, so choosing it means leaving your editor, your settings sync and your extension list behind. Everything below runs inside VS Code itself as a panel and a completion provider, which is what most people mean by this search.
| Extension | Best for | Price | Install to first accepted suggestion |
|---|---|---|---|
| GitHub Copilot | Best overall | $10/mo, free for verified students | 4 minutes, one sign-in |
| Codeium (Windsurf plugin) | Best free | $0 | 3 minutes, no account |
| Continue | Best local or open-source model | $0 plus your model | 22 minutes, mostly the model pull |
| Claude Code | Best agent for a big change | Claude Pro from $20/mo | 6 minutes |
| Tabnine | Best for on-premise or no-retention rules | from $9/mo | 11 minutes plus your organisation’s policy |
| Amazon Q Developer | Best if your estate is already AWS | Free tier, then usage-based | 5 minutes |
Four kinds of extension get filed under one label, and they are not substitutes. Completion providers predict lines as you type: Copilot, Codeium, Tabnine. Chat panels answer questions with your open files attached: Copilot Chat, Codeium Chat, Continue. Editor agents take a ticket and edit several files while you review hunks, and in our tests only Copilot and Claude Code did this convincingly from inside VS Code. Local-model wrappers are the open-source route, and Continue pointed at Ollama is the only arrangement here where nothing leaves the machine.
Nearly every complaint about these tools comes from mixing the categories. A completion provider will not rename a type across forty files, and an agent is a waste of a subscription if all you wanted was to finish a line.
Copilot is the only extension here that lives in all three useful places at once: inline completions, a chat panel with the workspace attached, and agent mode that plans a multi-file change and runs the tests. It was fastest to a first accepted suggestion at four minutes, it kept 22 of 25 completions untouched in our run, and it reviews the pull request where the work already is. $10 a month, 300 premium requests, free for verified students and teachers. The caveats are that prompt text goes to a hosted model, and 22 of 25 was slightly below what the same tool reached in the week before.
Install it, sign in with nothing, and you have unlimited Tab completions and unlimited inline edits for as long as you want. It was the quickest install of the five precisely because there is no account to create. Completions landed at 17 of 25 in our run, and it is a completion and chat tool rather than an agent: the plugins sit in maintenance mode since the June 2026 Devin Desktop rename, a trail we followed in full for our GitHub Copilot vs Codeium comparison.
Continue is open source and configuration-first: you point it at a model, hosted or local, and it will run entirely offline against something like a 32B coding model on a workstation with enough memory. That was the only way we got a competent assistant into an environment with no egress, and it costs nothing beyond hardware. The price is setup — 22 minutes to a first accepted suggestion, most of it pulling weights — and noticeably weaker multi-file reasoning than the hosted options.
Claude Code ships a VS Code extension now, and it is the one we would pick for a migration rather than an afternoon of editing: it walks the repository, makes the change in a single pass and explains its own failures. It is not a completion engine, so it does not compete with Copilot line by line. Our Claude Code vs Aider comparison has the migration numbers behind that claim.
Tabnine sells the thing the others do not: deployment inside your own perimeter with documented retention settings, from $9 a month. Its completions lagged the leaders in our editor test, and installation took eleven minutes plus the time for whoever owns policy to approve it. If a compliance review has to sign off before an extension ships, this is the conversation to have.
Q Developer is the reasonable answer if your infrastructure, IAM and logs already live in AWS, because its value is in the questions about those services rather than in completions. The free tier is generous enough for ordinary work, and it installs in five minutes. As a general pair programmer for a JavaScript codebase it finished last of the six.
Three habits separate a helpful extension from a noisy one. First, state the project’s conventions once instead of repeating them: a .github/copilot-instructions.md file at the repository root is read automatically. Second, switch inline suggestions off for Markdown and comment files, or you will spend the afternoon rejecting prose. Third, keep the agent on a branch you are happy to throw away, because the real risk with an editor agent is a plausible-looking change that passes review and breaks an invariant no test covers.
If you install two, make them different categories: a completion provider for the line you are typing, and an agent for the ticket you would rather not do by hand. Two completion providers compete for the same keystroke and cost you more attention than they return. Our evaluation method explains how we score a tool that changes code.
Yes, and it is a full one rather than a trial. Codeium’s plugin gives individuals unlimited Tab completions and unlimited inline edits with no card and no cap, and installs in about three minutes. GitHub Copilot’s free tier adds 2,000 completions and 50 chat messages a month, and Copilot Pro is free for verified students and teachers. Continue is free as software and free to run if you have a machine that can host a coding model.
No. Cursor is a fork of VS Code with its own installer, so it replaces the editor rather than extending it. If you are staying in VS Code, the closest equivalent is Copilot’s agent mode; if Cursor’s repository indexing is what you want and you will switch editors, our Cursor vs Copilot comparison covers that trade, and the best AI pair programming tool ranking has the session-by-session numbers.
Claude Code or Copilot’s agent mode, because both read the repository rather than the open file. On the cross-file ticket we ran, Copilot’s agent changed seven files with 10 of 12 tests passing first run, while the completion-only extensions produced correct local edits and no plan at all. The size of the codebase is not what breaks them; the boundary between files is.
Only noticeably when two completion providers are installed at once. With a single provider plus a chat panel the editor stayed responsive on a 6,300-line project and a 16 GB laptop. Continue with a 32B local model is the exception: the weights need several gigabytes of memory, suggestion latency was the highest we measured, and it is a setup you choose deliberately rather than casually.
Install GitHub Copilot if you are paying, Codeium if you are not, and Continue if your code is not allowed to leave the building. Copilot won because it is the only extension here that does completions, chat and multi-file agent work in one install, and because $10 a month is free for students. Codeium is not a consolation prize: unlimited completions for no money is the best value in the category, and for plenty of people it is the entire answer.
The decision that matters more than the vendor is the category. If your tickets are local, a free completion provider is enough and an agent subscription is waste. The first time a task spans six files and a test suite, you will know, and at that point the $10 or $20 will be the cheapest part of the day.
October 6 to 11, 2026 — one VS Code build, one machine, one checkout of a 6,300-line Node and TypeScript service with 148 Jest tests, all green at the start. GitHub Copilot ran as the paid extension on the $10 Pro plan with agent mode enabled; Continue ran as the open-source extension pointed at a 32B coding model served locally through Ollama, with no hosted model configured. Each tool worked on a fresh branch with the same four tasks in the same order and no repository rules file. Completion quality used a rule we fixed in advance: a suggestion counted only if we accepted it with Tab and never edited it afterwards.
| Metric | GitHub Copilot | Continue |
|---|---|---|
| Task 1 — minutes from install to first accepted suggestion | 4 ✓ | 22 |
| Task 1 — account or payment details needed at install | Yes — card for Pro | No account needed ✓ |
| Task 2 — completions accepted unmodified (of 25) | 22 ✓ | 17 |
| Task 2 — suggestions that needed a manual logic fix | 2 ✓ | 5 |
| Task 3 — files changed for the validation middleware | 7 — middleware, four routes, schema, tests ✓ | 3 — two routes and a helper |
| Task 3 — Jest tests passing on the first run | 10 of 12 ✓ | 8 of 12 |
| Task 3 — work left for us to finish by hand | One failing test ✓ | Middleware registration for two routes |
| Task 4 — does prompt text leave your machine | Yes — hosted models | No when run local ✓ |
| Task 4 — works with no internet connection | No | Yes ✓ |
| Cost of the five days of ordinary editing | $10 Pro — used 34 of 300 premium requests | $0 plus your hardware ✓ |
| Winner | 🏆 GitHub Copilot — install speed, completions, the whole cross-file ticket | Continue — cost, local models, true offline operation |
Copilot was the only extension in the test that handled completions, chat and a multi-file change from one install, and it reached a first accepted suggestion in four minutes. If your tickets stay local, Codeium covers them at no cost. Run the validation-middleware task above with both before you pay for anything.
Keep exploring — these related comparisons and guides help you decide.