How to fix Critical Quota Error and 7-day lockout in Antigravity?

Users on the Google AI Pro plan are seeing a persistent “Model quota limit exceeded” in Antigravity IDE with a 4–7 day lockout instead of the documented 5-hour cooldown. It appears most often when using Claude Opus 4.5 (Thinking) inside existing projects.

How to fix Critical Quota Error and 7-day lockout in Antigravity?

Antigravity shows: “Model quota limit exceeded” with incorrect resume dates (for example, 1/16/2026 in an existing session and 1/13/2026 in a new chat). Multiple users confirm the refresh period incorrectly shows as 4–7 days, not 5 hours.

Environment noted: Windows 11, Chrome, Google AI Pro plan.

For more context on the error pattern and affected tiers, see our quick explainer: how to fix the Critical Quota Error in Antigravity.

Solution Overview

How to fix Critical Quota Error and 7-day lockout in Antigravity?

Step-by-Step Solution

1) Verify plan and capture evidence

• Confirm your plan shows as Google AI Pro in Account/Billing.
• Take a screenshot of the error message and the incorrect resume date. Note the time, model, and project name.
• This proof speeds up a support-side manual reset if needed.

2) Sign out and clear Antigravity site data (Chrome)

• In Chrome, open the site that shows the error.
• Click the padlock icon in the address bar > Site settings > Clear data, then remove all cookies/storage for the Antigravity domain.
• Close all Antigravity tabs.
• Optional: fully clear the Chrome cache for the profile (Windows PowerShell example; closes Chrome).
• Warning: This removes cache for the Default profile. Back up if needed.
• Commands: PowerShell (run as your user): Stop-Process -Name chrome -Force Remove-Item -Recurse -Force "$env:LOCALAPPDATA\Google\Chrome\User Data\Default\Cache*"
• Sign back in to Antigravity.

3) Start a new chat in a fresh project and change the model

• Create a new project/workspace.
• Open the Model dropdown and select a non-“Thinking” variant (for example, “Claude Opus 4.5” without Thinking) or a different vendor/model (e.g., Gemini 2.0).
• Send a very short test message (e.g., “test”).
• If the error disappears, migrate your ongoing work into the new chat.

4) Force a model/session refresh if the banner persists

• Switch to another model vendor, send one short message, then switch back to your preferred model.
• If your Antigravity account supports orgs/workspaces, switch to a different workspace, send a short message, then return.

5) If still blocked, request a manual quota reset

• Open a support ticket with:
• Your plan (Google AI Pro)
• Affected model (Claude Opus 4.5 Thinking)
• Incorrect resume date(s)
• Project ID/URL
• Timezone and local system time
• Screenshots
• Sample message:
• “Pro plan shows ‘Model quota limit exceeded’ with a 4–7 day lockout for Claude Opus 4.5 (Thinking). Documented cooldown is 5 hours. Please reset my quota and purge any stale session state for my account.”

6) Temporary workaround: use API or another model until reset

• If your work is blocked, call the model via API (Anthropic or Google) while support resets your quota. Examples:

Anthropic (Claude) via cURL:
curl https://api.anthropic.com/v1/messages \
 -H "x-api-key: $ANTHROPIC_API_KEY" \
 -H "anthropic-version: 2023-06-01" \
 -H "content-type: application/json" \
 -d '{
 "model": "claude-3-opus-20240229",
 "max_tokens": 256,
 "messages": [{"role": "user", "content": "Hello"}]
 }'

Google Generative Language API (Gemini) via cURL:
curl -s -X POST \
 -H "Content-Type: application/json" \
 -d '{"contents":[{"parts":[{"text":"Hello"}]}]}' \
 "https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent?key=$GEMINI_API_KEY"

If you encounter related agent crashes during recovery, check this quick fix: Read More: Fix Agent Terminated Due To Error.

Alternative Fixes & Workarounds

Use an Incognito window or a new browser profile

• Fresh Chrome profile often clears the stuck quota banner faster than generic cache clears.

Try a different browser

• Test in Edge/Firefox to rule out extension conflicts or Chrome profile issues.

Sync your system clock

• Incorrect local time can compound session/accounting issues.
• Windows (Command Prompt as admin): w32tm /resync
• macOS: sudo sntp -sS time.apple.com
• Linux: sudo timedatectl set-ntp true

For a shorter walkthrough focused only on the quota banner, see this quick note: Read More: background on the Antigravity quota banner.

Troubleshooting Tips

• Check current quotas and limits for your plan to confirm the 5-hour expectation: Google AI pricing and quotas.
• Disable VPNs/proxies and privacy extensions that might block session refresh calls.
• Remove or pause extension-based content filters (script blockers) for the Antigravity domain.
• Reproduce in a brand-new chat with a different base model to isolate the issue from a single stuck thread.
• Track known incidents on provider status pages: Anthropic Status and Google Cloud Status.

Need a condensed, step-by-step version? Read More: repair steps for Critical Quota Error.

Best Practices

• Prefer non-“Thinking” variants for long-running conversations; switch to “Thinking” only when needed.
• Keep conversations modular; start a new chat for major context shifts to avoid stale session state.
• Maintain a secondary model configured for overflow so work doesn’t stall.
• Periodically sign out/in to refresh tokens if you run into repeated quota banners.
• Keep evidence (timestamps, screenshots) to speed up support resets.

Final Thought

This issue is caused by a stuck quota state in Antigravity, not your actual Pro plan limits. Clearing site data, starting a fresh chat, and switching models usually fixes it fast; and support can reset any lingering 4–7 day lockouts.