Custom models allow you to create multiple aliases for the same underlying model. This is particularly useful when configuring fallback systems where you want to use the same model with different priorities or for different purposes. By creating distinct names for the same model, you can track usage separately and call each instance independently.
Choose a base model and add your custom model name.
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Example
You can add multiple model names for the same model just like the example below. There are 3 custom models for the same base model gpt-4o, but you can call them independently and add 2 of them to the fallback list.