> ## Documentation Index
> Fetch the complete documentation index at: https://ngrok.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Error ERR_NGROK_AI_GATEWAY_MODELS_OUTPUT_CONFLICT

> Learn what ERR_NGROK_AI_GATEWAY_MODELS_OUTPUT_CONFLICT means, why ngrok returns it, and how to fix it.

## ERR\_NGROK\_AI\_GATEWAY\_MODELS\_OUTPUT\_CONFLICT

`MODEL` bills per `UNIT`, so the request can fail over only between models that return the same outputs. It returns `OUTPUTS`, but `OTHERMODEL` returns `OTHEROUTPUTS`.

## Further help

If you're having trouble resolving this error, please reach out to [support@ngrok.com](mailto:support@ngrok.com?subject=Help%20with%20ERR_NGROK_AI_GATEWAY_MODELS_OUTPUT_CONFLICT)


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