What Is Supermaven and What Does It Do?

Updated

Supermaven is an AI code completion tool (a "copilot") that plugs into your editor and suggests code as you type. Its main selling points are speed and a large context window: the site claims responses about 3x faster than competitors (250 ms vs. 783 ms latency in its comparison) and a 1 million token context window on the Pro plan, which lets it pull definitions and patterns from elsewhere in a large codebase into its suggestions. It works with VS Code, JetBrains IDEs, and Neovim, and also includes a separate chat interface for talking to models like GPT-4o and Claude 3.5 Sonnet.

What Supermaven actually does

Supermaven has two distinct surfaces:

  • Inline code completion — as you type, it suggests the next lines or blocks. The site's example shows it finding a PostMetadata type defined elsewhere in the project and using it to produce a correct parsePostMetadata function, rather than guessing from the current file alone.
  • Supermaven Chat — a chat panel for developers. You can attach recently edited files, use hotkeys to view diffs, apply changes, start conversations, and switch models. It links a model's code response back to your original code so you can see a diff and apply it. There's also a one-click flow for fixing errors that uploads your code together with compiler diagnostic messages.

The context window, and why it matters

Most completion tools only see the file you're in plus a little surrounding context. Supermaven's pitch is that a 1 million token window lets it consider much more of your project at once, so suggestions match your existing types, naming, and patterns. The tradeoff is plan-gated: the 1 million token context window, the "largest, most intelligent model," style adaptation, and $5/month in Chat credits are all listed as Pro only. The Free tier gets fast, high-quality suggestions and works with large codebases, but not the large context window.

Plans and pricing

Feature Free Pro
Price $0/month $10/month (monthly or yearly)
Code suggestions Fast, high-quality Fast, high-quality
Large codebases Yes Yes
Data retention 7-day limit 7-day limit
Adapts to your coding style — Yes
1M token context window — Yes
Largest, most intelligent model — Yes
Supermaven Chat credits — $5/month
Trial — 30-day free trial
Centralized user management — Yes

The Pro plan also lists centralized user management, which points at team use. Pricing details beyond these figures aren't specified on the page, so check the pricing page for current terms.

Who it's for

  • Solo developers on a budget — the Free tier is a complete, usable copilot at $0, with the main limits being the 7-day data retention and no large context window.
  • Developers on large or professional codebases — Pro's 1M token context window is the reason to upgrade; it's the feature most tied to suggestion quality across a big project.
  • Teams — Pro's centralized user management and the 30-day trial make it the plan to evaluate first.
  • Editor flexibility — if you use VS Code, a JetBrains IDE, or Neovim, all three are supported, so you don't have to switch editors to try it.

How to get started

  1. Go to supermaven.com and download the extension for your editor (VS Code, JetBrains, or Neovim).
  2. Install it and sign in. The Free tier requires no payment.
  3. Open a project and start typing — suggestions appear inline. Accept them with your editor's usual completion key.
  4. If you want the 1M token context window, style adaptation, or Chat credits, start the 30-day Pro trial and evaluate it against your own codebase.

The practical test is whether suggestions correctly reference types and functions defined in other files. That's the behavior Supermaven is built around, and it's the clearest signal of whether the Pro context window is worth $10/month for your projects.