Jun 8, 2026

Cursor tab completion not working in 2026: 8 fixes ranked by how often they actually work

By AICoderScope Team · 12 min read

cursortroubleshootingfixautocompletesetup-guide

TL;DR: Cursor Tab (the inline ghost-text autocomplete) breaks in 8 distinct ways. Roughly 70% of cases are fixed in under a minute by checking three things: the toggle in Settings, your extension list for Copilot, and your usage quota. The remaining 30% need a corporate proxy fix or a toggle-restart cycle.

After this guide you will:

Know which of the 8 root causes matches your specific symptom
Have the exact settings path and command for each fix
Understand the 2,000-completion monthly cap on the Hobby plan that silently kills suggestions at month-end

Honest take: Every “Cursor Tab is broken” thread in 2026 falls into one of these eight buckets. Go through the three-step quick check first — most readers fix it there.

The 60-second triage: three checks before anything else

Open Cursor and verify these in order. They resolve 70% of cases.

1. Is Cursor Tab actually enabled?

Press Ctrl+Shift+J (Windows/Linux) or Cmd+Shift+J (Mac) to open Cursor Settings, then go to Features > Cursor Tab. The toggle should be on. If it’s off — and this happens more than it should after updates — flip it, restart Cursor, done.

You can also check from the status bar at the bottom right of the editor. A small “Tab” indicator shows whether inline completions are active. If it shows disabled, click it to re-enable.

2. Have you hit the free quota?

On the Hobby plan, Cursor gives you 2,000 tab completions per month. During active coding at a normal acceptance rate, you can burn through 50–100 per hour. If you’re late in the billing cycle, open Settings > Usage & Limits and check the completions counter.

Completions reset on your account anniversary date, not the calendar month. When you hit 2,000/2,000, tab completion stops silently — no error, no banner, just nothing appearing. Upgrade to Pro ($20/mo) or wait for the reset.

3. Is GitHub Copilot or Tabnine installed?

If you migrated from VS Code with extensions intact, you may have GitHub Copilot sitting in your extension list. Copilot and Cursor Tab both hook into the same editor completion API and fight over the Tab key. The result: neither works reliably.

Open the Extensions panel (Ctrl+Shift+X), search for “GitHub Copilot”, and disable or uninstall it. Restart Cursor. Tabnine causes the same conflict — disable it too. You don’t need either inside Cursor; Cursor Tab already covers what they do, with deeper codebase context.

If all three checks pass and tab completion still isn’t working, move to the specific fixes below.

Fix 1: The toggle-restart cycle (state corruption)

There’s a documented bug across multiple Cursor versions where tab completion gets into a broken state: completions stop appearing, but the toggle shows as enabled. The toggle is lying about the internal state.

The fix:

Go to Settings > Features > Cursor Tab and disable Cursor Tab
Fully quit Cursor — not just close the window. Use File > Exit on Windows or Cmd+Q on Mac
Reopen Cursor
Go back to Settings > Features > Cursor Tab and re-enable it
Quit and reopen Cursor a second time

This double-restart cycle clears the desync between the toggle state and the running completion service. It resolves a surprising percentage of “nothing I do works” cases and is confirmed to fix the issue in v2.4.21 and multiple 3.x releases.

Fix 2: Extension conflicts and the “No full commit provider registered” error

Even with Copilot gone, other extensions can interfere. Language server extensions — Pylance, rust-analyzer, clangd, and any plugin with aggressive IntelliSense hooks — sometimes register as completion providers and conflict with Cursor’s engine. When this happens, you’ll sometimes see this in the developer console (Help > Toggle Developer Tools):

No full commit provider registered

To isolate which extension is causing it:

Open the Command Palette (Ctrl+Shift+P or Cmd+Shift+P)
Run “Disable All Extensions”
Restart Cursor
Test tab completion — if it works now, an extension is the culprit
Re-enable extensions one at a time, restarting each time, until completions break again

The usual suspects: C++ extension packs, Flutter/Dart plugins, and any extension that ships its own completion engine. Once you’ve found the conflicting extension, check for an update or leave it disabled.

Fix 3: HTTP/2 corporate proxy block

If you’re on a corporate network with a proxy — Zscaler, Netskope, BlueCoat, and similar — Cursor’s tab completions will silently fail. Cursor uses HTTP/2 for all AI features: chat, autocomplete, and codebase indexing. Enterprise proxies often block HTTP/2 while letting HTTP/1.1 pass. The result looks like a random connection problem but is a protocol-level block.

Symptoms that point to this cause:

Tab completion works fine on home wifi, broken on the office network
Chat completions also fail or time out
No error message — just silence

Fix:

Open Cursor Settings > Network
Find the “Use HTTP/2” toggle and disable it
Restart Cursor

If your IT team requires explicit proxy configuration or a custom certificate, those are usually separate steps — ask for the PAC file URL or root certificate and add it via Settings > Proxy.

Disabling HTTP/2 does slow down chat streaming marginally, but it’s the only practical option on corporate networks where HTTP/2 is blocked at the firewall.

Fix 4: Keybinding conflict

If ghost text appears but pressing Tab doesn’t accept the suggestion, the Tab key itself has been remapped by something.

Common causes:

You imported your VS Code keybinding file and it contains a Tab override
A Vim or Emacs emulation extension captures Tab for indentation or jump-list navigation
A snippet extension intercepts Tab for snippet expansion

Find the conflict:

Cmd+Shift+P → "Open Keyboard Shortcuts" → search "Tab"

Look for any keybinding that overrides tab in the editorTextFocus context. If you see one you didn’t add, hover over it and click the trash icon to remove it.

For VIM users: VSCodeVim binds Tab to <C-i> (jump forward in jumplist) in normal mode. That’s expected — switch to insert mode before expecting Tab to accept completions. This is the most common “Tab doesn’t work” complaint from people coming from Vim.

Fix 5: Completions are slow (over 3 seconds)

Cursor Tab should respond in under 500 ms. If you’re waiting 3–5 seconds per suggestion, you may have accidentally overridden the completion model.

Navigate to Settings > Models and check the inline completion model configuration. The default is Cursor’s proprietary fast completion model — optimized for latency, not reasoning depth. If you’ve pointed it at claude-opus-4-8 or gpt-4o, you’ve traded speed for quality at a cost that makes inline completion unusable. Chat and Cmd+K are where heavy models belong.

Reset the completion model to the default. You’ll notice the difference immediately.

Fix 6: Codebase indexing stuck on “loading…”

Cursor Tab quality degrades significantly when indexing hasn’t completed. Worse, if indexing gets stuck — which happens on repos with large binary files, deep node_modules, or symlinks — completions may appear but be completely context-free: generic boilerplate that ignores your actual codebase.

Check indexing status from the bottom-left status bar (look for a spinning indicator) or via View > Cursor Logs → search “indexing”.

If it’s stuck:

Open the Command Palette
Run “Cursor: Clear Codebase Index”
Wait for full reindexing (5–15 minutes on large repos)

Prevent future hangs by adding a .cursorignore file at your repo root:

node_modules/
.git/
dist/
build/
*.min.js
*.map
__pycache__/
*.pyc

This skips binary blobs and generated files that bloat the index without improving completion quality. A lean index also means faster initial indexing on future opens.

Fix 7: Cursor update introduced a regression

Cursor ships automatic updates. Occasionally an update breaks tab completion — v2.4.21 had a documented regression where autocompletion fired inconsistently, confirmed across Windows and macOS in community bug reports.

To check your situation:

Go to Help > About to see your current version
Check cursor.com/changelog for any tab-related fixes in recent releases
Check status.cursor.sh for active service incidents — sometimes it’s a backend issue, not a local one

Regressions typically get a hotfix within 24–48 hours. If the community forum confirms the current version is broken, the fastest path is waiting for the patch rather than trying workarounds.

If you need to downgrade, older installer packages are available in the Cursor GitHub releases.

Fix 8: Account session expired (Pro benefits silently reverted)

If your Cursor account session has expired, Pro plan benefits revert to Hobby limits without any warning. You won’t see an error — completions just stop appearing after 2,000 uses, and you may wonder why you’re suddenly hitting the cap mid-month.

Open Cursor Settings > Account and confirm you’re signed in with the correct email. If the account section shows a login prompt instead of your account details, log back in and restart. This is especially common after a Cursor update resets the credentials cache.

Symptom → fix reference

Symptom	Most likely cause	Fix
Ghost text never appears	Cursor Tab disabled	Settings > Features > Cursor Tab → enable
Worked yesterday, stopped today	Quota exhausted (Hobby plan)	Settings > Usage & Limits
Completions appear, Tab won’t accept	Keybinding conflict	Open Keyboard Shortcuts, remove Tab override
Works at home, broken at office	HTTP/2 proxy block	Settings > Network → disable HTTP/2
Ghost text is generic, ignores your code	Indexing stuck	Run “Cursor: Clear Codebase Index”
Toggle shows enabled, nothing appears	State corruption	Toggle off → quit → toggle on → quit (Fix 1)
Completions take 3–5 seconds	Wrong completion model	Settings > Models → reset to default
”No full commit provider registered” in console	Extension conflict	Disable all extensions, isolate via audit
Completions stopped mid-month unexpectedly	Account session expired	Settings > Account → log back in

The Hobby plan quota trap in practice

The 2,000 completions/month limit on the Hobby plan has one particularly frustrating behavior: Cursor doesn’t notify you when you approach or hit the cap. There’s no banner, no yellow warning, no email. Completions just stop.

If you hit the limit mid-project and can’t upgrade immediately:

Check the reset date: Go to Settings > Usage — your quota resets on your account creation anniversary, not the first of the month. You might be closer to a reset than you think.
Reduce acceptance rate: Use Tab more selectively. Pressing Escape to dismiss suggestions that aren’t useful doesn’t count against your quota; only accepted completions do.
Upgrade to Pro: $20/month gives unlimited tab completions. The completion model is absorbed into the subscription cost — Cursor doesn’t charge per-completion on Pro. For context on whether the upgrade makes sense for your workflow, see the Cursor Teams June 2026 pricing breakdown.

If you’re interested in local alternatives that don’t have any quota: Continue.dev with Ollama gives you unlimited tab completion backed by a local model. The quality tradeoff versus Cursor’s proprietary completion engine is real, but for high-volume coding sessions on a budget it’s worth knowing the option exists. See the Continue.dev + Ollama setup guide for a full comparison.

FAQ

Why did Cursor Tab stop working after I installed a new extension? New extensions that register as IntelliSense providers compete with Cursor’s completion engine. The disable-all → test → re-enable-one-at-a-time method from Fix 2 is the reliable diagnostic path. Usually takes under 10 minutes to find the culprit.

Can I use Cursor Tab with a local model (Ollama, LM Studio)? No. The fast inline tab completion model is Cursor’s proprietary engine — you can’t swap it for a local model. Local models only apply to the chat panel and Cmd+K. If you want fully local tab completion with no API dependency, Continue.dev is built for that use case.

Cursor Tab worked in Cursor 2.x, broke after upgrading to 3.x. The Cursor 3 interface redesign changed how settings are migrated across upgrades. Some users found the Cursor Tab toggle was reset to off after the update, with no notification. Go to Settings > Features > Cursor Tab and check — it’s a one-second fix if that’s the cause.

Ghost text appears but it’s always wrong or useless. This is an indexing quality issue, not a completion failure. The completion model is running; it just has no context about your codebase because the index is stale or too large to process properly. Run “Cursor: Clear Codebase Index” and add a .cursorignore file to exclude generated files.

Does disabling HTTP/2 affect chat performance? Slightly. Long chat responses stream marginally slower over HTTP/1.1. But if you’re on a corporate network where HTTP/2 is blocked, the alternative is nothing working at all. The chat latency difference in practice is under 20%, which is barely noticeable.

I’m on Pro and completions still stopped — what’s happening? Check Fix 8 (session expiry) first. If that’s not it, go to Fix 7 and check status.cursor.sh — a backend incident sometimes affects completions even on paid plans. The Pro tier gets faster completions, but it still depends on Cursor’s inference infrastructure being up.

Sources

Last updated June 8, 2026. Cursor ships frequent updates; settings paths may shift between minor versions. Verify current behavior at cursor.com/changelog.

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