Comparisons · measured July 2026 · 7 min
Claude Code vs Windsurf: two takes on the AI coder.
One lives in your terminal. One hands you a whole IDE. Same job (write code with an agent driving), opposite shapes. But watch either one work on a real project and you notice the same quiet tax: before it can change a line, it has to find the line. On a 4.47-million-file machine that hunt can eat most of a session. This is an honest look at how each gets its code context, where each hits a wall, and the one layer both can stand on.
TL;DR · the short version
Different shape. Same blind spot.
Claude Code is a terminal agent; Windsurf is a full AI IDE. Same task, opposite front doors.
Claude Code gets context by running shell tools live (grep, ls, read): literal, reaches any file, no index, so it re-walks the disk and burns tokens.
Windsurf gets context by indexing the workspace you open and recalling code by meaning: fast and semantic, but scoped to that one project and usable only inside Windsurf.
Neither keeps a warm, whole-machine index. On a 4.47M-file PC, one Claude Code file hunt ran 6m 57s across 71 tool calls and spent ~58% of the session's tokens.
Both speak MCP, so both can share one always-fresh, machine-wide index that answers in the microsecond range (139 µs median). Interlinked builds exactly that.
The two mechanisms, drawn fairly
One greps. The other indexes.
Claude Code is Anthropic's coding agent that lives in your terminal: it reads and edits files by running the same shell commands a developer types by hand (grep, ls, read), reading the disk fresh each time. It keeps no index of its own.
Windsurf is an AI-native IDE, a full code editor (built on VS Code) whose agent, Cascade, indexes the project you open and pulls in relevant code by meaning rather than by exact spelling. Both are good engineering for the job each was built for. Line them up honestly:
| How each gets context | Claude Code | Windsurf |
|---|---|---|
| Form factor | terminal agent, a CLI | full AI IDE, a VS Code fork |
| Gets context by | shell tools: grep, ls, read | indexing the workspace, recalling by meaning |
| Kind of match | literal, the exact string you asked for | semantic, related code, other words |
| Scope | anything the shell can reach | the workspace you opened |
| Freshness | live: reads the disk right now | re-indexes files as you edit them |
| Reusable by | only the command that ran it | only Windsurf |
| Speaks MCP | yes, one connector to any server | yes, Cascade supports MCP servers |
Read across and the trade is clear: literal-and-everywhere versus semantic-and-scoped, a CLI versus a full editor. All of the above is public in each tool's own docs: Windsurf's codebase indexing and its Cascade agent, Claude Code's shell-tool approach to files. The last row is the one that matters most here: both already speak MCP.
Terminal agent vs IDE · the two context paths
They aren't rivals. They're two doors to the same code.
The terminal grep and the workspace index are different front doors, not competing engines. Underneath, both can plug into one shared, always-warm index of the whole machine, over MCP, the open protocol every major agent now speaks. Windsurf keeps its semantic recall inside your project; Claude Code keeps its shell reach; and both gain a fast, literal, machine-wide lookup they can call in one step. Here is the shape.
A terminal and an IDE are two front doors to the same code. Neither agent changes how it works: both just gain a warm, whole-machine index to call.
The honest verdict
Better at different things, blind in the same place.
For semantic questions inside the workspace you have open, Windsurf gives the model excellent context: that is exactly what a recall index is for. For a literal string that could live anywhere, Claude Code's shell reach wins, until you time it. Neither is strictly better. Both pay a price, and they leave the same gap.
No index of its own. It re-walks the disk on every query: nothing warm to ask, so it lists, reads, guesses, and retries.
On a 4.47M-file drive, one file hunt ran 6m 57s across 71 tool calls and spent ~58% of the session's tokens before it opened the right file.
For content it shells out to ripgrep (the fastest grep there is) which still reads the disk each time: 93.8s on one query here.
Every lookup is one-shot: the next question restarts the walk, and so does the next agent on the same machine.
The index stops at the workspace you opened, the right design for an in-editor assistant, and a hard boundary.
Sibling repos that ship together, and the non-git ~90% of the disk (configs, docs, datasets, the PDF with the answer) sit outside it.
The recall lives inside Windsurf; Claude Code, Codex and Copilot on the same machine start from nothing.
It sees the project you pointed it at, not your machine's wider, unpushed reality.
Neither answers the simplest whole-machine question quickly: does this exact string exist anywhere on this disk? One re-walks the entire drive to find out; the other only ever sees the workspace you opened. The layer nobody keeps warm is the one closest to you: the whole machine.
Methodology: Ryzen 9 9950X3D · 64 GB DDR5 · NVMe · Windows 11 · 4,470,000 files. Claude Code figures are the measured agent runs; the warm baseline is an 85 µs single-file lookup (139 µs median of 20 queries). Windsurf's mechanism and scope are drawn from its public documentation. No time is invented for it. More on each side in How Claude Code finds files and the ripgrep comparison.
The layer under both
Index the whole machine. Hand it to every agent.
Interlinked draws the floor in that diagram. It keeps an always-fresh index of every file on the machine (names and contents) across every repo and the non-git 90%, and exposes it to whatever agent you use through one connector. It is not a semantic index and doesn't try to be: it's the fast, literal, exhaustive layer that answers "does this exact string exist anywhere on this machine?" in the time Windsurf takes to notice you pressed a key. Complementary to the recall, and a warm floor under the shell tools. It's the retrieval half of the backbone of the LLM economy.
And because it sees the whole disk, it carries something neither a per-workspace recall index nor a terminal grep can: a knowledge vault the engine derives by itself: which files change together, which repos ship as a set, plus notes any agent leaves that every other agent reads. On a fresh machine, day one:
For scale on the same drive: that filename lookup takes VS Code's own search about 35 seconds (long enough to lose your train of thought) which is 412,000× slower; Windows Search a median 67 seconds, roughly 480,000×. A saved edit is searchable in about a millisecond, under 30 ms worst case. At rest the whole engine sits around 44 MB in Task Manager (less than a single browser tab) and the index on disk stays under 1% of the drive. There is no model anywhere in the box.
NOT A REPLACEMENT FOR WINDSURF'S RECALL OR YOUR TERMINAL: THE FAST, LITERAL, WHOLE-MACHINE LAYER UNDER BOTH.
Questions people actually ask
Claude Code vs Windsurf, answered.
Is Claude Code or Windsurf better?
Neither is universally better: they're different shapes. Claude Code, a terminal agent, is literal and reaches any file with zero setup but keeps no index. Windsurf, an AI IDE, recalls code by meaning inside the workspace you open. Pick by your workflow; both get faster with a shared machine-wide index behind them.
Does Windsurf index my whole computer?
No. Per its own documentation, Windsurf indexes the workspace or project you open, not the whole machine, and not the non-git files that live outside it. That is a deliberate, correct design for an in-editor assistant; it is also a hard boundary.
Can Claude Code and Windsurf use the same file index?
Yes. Both speak MCP, the open connector protocol, so a single machine-wide index (like Interlinked's) can serve both agents through one connection. You index once and every agent on the machine can call it.
Why is my AI agent slow to find files?
Because most agents either re-walk the disk on every query (a terminal grep) or only see one indexed project (an IDE). Neither keeps a warm, whole-machine index, so a lookup that should take microseconds takes minutes. That warm layer is what turns a 6m 57s hunt into a single 16 ms call.
Does Interlinked replace Windsurf's indexing or my terminal?
No. It isn't a semantic index and doesn't try to be. It's the fast, literal, whole-machine layer under both, complementary to Windsurf's recall inside your repo, and a warm floor under Claude Code's shell tools.
Do this today
Give both agents the same map.
Install once. One signed installer indexes every file on your machine and auto-configures 19 AI clients: Claude Code, Windsurf, Cursor, Copilot, Codex, Zed and the rest. No JSON editing, no cloud account, no keys.
Keep both. Nothing here asks you to leave your terminal or close Windsurf. Windsurf keeps its in-workspace recall; Claude Code keeps its shell reach; both gain a fast, literal, whole-machine lookup alongside.
Scope when you can. Whole-machine when you don't know where something lives; scoped to a folder when you do. Scoped queries return in the microsecond range.
Ask across the machine. Then ask any agent “which repos do I have, and how do they relate?” and watch how much lived outside the one workspace Windsurf could see.
Everything local is free forever, on all your devices, no card. Hosting starts at $5.99/mo. Download for Windows · The Cursor cut of this comparison