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

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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