What this error means
The model gpt-4 does not work with your current plan or api key is a Cursor failure pattern reported for developers trying to fix cursor ide refusing to use custom models (gpt-4, claude) when custom api key (byok) mode is enabled, particularly breaking agent and edit features that depend on custom models. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
Found across multiple sources: Cursor community forum (#76097), Stack Overflow (#79544040), and developer blog analysis (#3390 on githubissues.com). Users report model access loss specifically when entering BYOK API keys in Settings → Models. Cursor's Auto mode gets confused when API permissions change. Agent and Edit features depend on custom models but fail with BYOK. Known product limitation rather than transient bug — strong search demand, high commercial value for Cursor paid subscribers.
Common causes
- Found across multiple sources: Cursor community forum (#76097), Stack Overflow (#79544040), and developer blog analysis (#3390 on githubissues.com). Users report model access loss specifically when entering BYOK API keys in Settings → Models. Cursor's Auto mode gets confused when API permissions change. Agent and Edit features depend on custom models but fail with BYOK. Known product limitation rather than transient bug — strong search demand, high commercial value for Cursor paid subscribers.
Quick fixes
- Confirm the exact error signature matches
The model gpt-4 does not work with your current plan or api key. - Check the Cursor account, local tool state, and provider configuration involved in the failing workflow.
- Compare the failing environment with a known working setup, then change one configuration value at a time.
Platform/tool-specific checks
- Verify the command, editor, extension, or API client that produced the error.
- Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
- Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- Keep the working fix documented for the team or deployment environment.
How to prevent it
- Keep provider/tool configuration documented.
- Record non-secret diagnostics such as tool version, provider name, model name, and command path.
- Add a lightweight check before CI or production workflows depend on the tool.