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Configure

In Cursor Settings → Models:
  • Enable Override OpenAI Base URL and set it to:
  • Paste your lx1_ key into the OpenAI API Key field.
  • Under model names, add a custom model for each catalog id you want to use — e.g. lx1-gpt-oss-120b, lx1-glm-5, lx1-sonnet-4.6.
  • Click Verify — Cursor sends a probe to /v1/chat/completions and should turn green.

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Troubleshooting

  • Verify fails? The base URL must end in /v1 and at least one custom model name must be a valid catalog id — Cursor verifies with the model currently selected.
  • Model “not found”? Model names are exact — lx1-glm-5, not glm-5. Copy ids from the catalog page.
  • Built-in models stopped working? Expected: overriding the OpenAI base URL points Cursor’s OpenAI slot at Layer X1. Toggle the override off to switch back.
Cursor uses its own accounts for some built-in features; the override governs the chat/composer models you add by name. Every lx1 model you add is included in your plan — pick per task, not per budget.

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Cursor CLI (agent)

Cursor Agent CLI (agent / cursor agent) does not support BYOK or a custom OpenAI-compatible base URL — it only talks to Cursor Cloud under your Cursor account. There is no config file the installer can write.
prints the IDE override above and a one-liner for a terminal agent Layer X1 can configure (hermes, codex, claude-code).