GLM-5.3 model not found (it worked the day it came out)

Support Bug Reports
1

Why did it stopped working? I could only use it for 1 day.
May I know when can we get glm-5.3 or 5.3 flash back to cursor?

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
A clear and concise description of what the bug is.

Steps to Reproduce
How can you reproduce this bug? We have a much better chance at fixing issues if we can reproduce them!

  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 @Andreul369, GLM-5.3 and 5.3 Flash have never been built-in Cursor models (the native GLM is 5.2). What you used was a custom model on your own API key, so “model not found” is coming back from your provider, not Cursor.

To restore it in Cursor Settings → Models:

  1. Re-enter your provider key under API Keys (OpenAI field) and turn it on.
  2. Set Override OpenAI Base URL to match your key: Z.ai Coding Plan https://api.z.ai/api/coding/paas/v4, or pay-per-token Z.ai https://api.z.ai/api/paas/v4. Wrong endpoint for your key type returns “model not found”.
  3. Add the custom model with the exact case-sensitive ID: glm-5.3 or glm-5.3-flash (OpenRouter: z-ai/glm-5.3-flash).
  4. Check your plan/credits are still active on the provider’s side (a lapsed plan also returns “model not found”).

Native GLM 5.3 is a tracked request with no date to share, but you can vote here: New model request GLM-5.3

8

Oh my god, the “Use OpenAI API Key” radio button was turned off for some reason. I tried capslock, no caps, open router, z.ai api key. :joy::joy: Sorry