Cursor Grok 4.6 fails on every prompt with Cloudflare “Sorry, you have been blocked” on x.ai

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1

Grok 4.6 fails on every prompt with Cloudflare “Sorry, you have been blocked” on x.ai.
Plan: Pro+
Request ID: 522f2b3b-40ef-44a3-adee-9fa338b37054
Cloudflare Ray ID: a3498cabbd0a17b8
Blocked IP shown: 52.44.113.131 (AWS)
Other models work; only Grok 4.6 is affected.

2

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

To help us investigate and fix this faster, could you edit your original post to include the details from the template below?

Bug Report Template - Click to expand

Where does the bug appear (feature/product)?

  • Editor, Tab & Chat (autocomplete, Composer, in-editor agent)
  • Terminal & commands
  • Models, pricing & API keys (availability, Auto/Max, BYOK/Bedrock)
  • MCP & tools
  • Cloud Agents & Automations (cursor.com/agents, scheduled/event)
  • BugBot & Code Review
  • Cursor CLI
  • Cursor Mobile
  • Remote (SSH / Dev Containers / WSL)
  • Account, billing & login
  • Something else…

Describe the Bug
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Steps to Reproduce
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  1. …
  2. …
  3. …

Expected Behavior
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Screenshots / Screen Recordings
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Operating System

  • Windows 10/11
  • MacOS
  • Linux

Version Information

  • For Cursor IDE: Menu → About Cursor → Copy
  • For Cursor CLI: Run agent about in your terminal
IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)

For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…

Additional Information
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Does this stop you from using Cursor?

  • Yes - Cursor is unusable
  • Sometimes - I can sometimes use Cursor
  • No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!

7

Hey, this isn’t a block on Cursor’s side, and your account is fine. It happens when Grok 4.6 gets sent under a personal API key (Grok 4.6 only runs on Cursor’s own infrastructure).

Fix:

  1. Open Cursor Settings → Models.
  2. Turn off any personal API key that’s enabled (OpenAI, Azure OpenAI, Anthropic, Google, Bedrock), and make sure “Override OpenAI Base URL” is off.
  3. Start a new chat with Grok 4.6.

That should sort it. If you want to keep a personal key for other providers, just switch it off when using Grok 4.6 - it can’t run on one. Details: Bring your own API key. Let me know if it still fails!