It depends on which AI model you are using.
Royalty-Free Voices & Instrument Library: you have a royalty-free license to use the output of these models, so long as you had full rights to use whatever content you put into the models.
Your Trained Models: assuming you created an AI voice model using contents you have the rights to, as required by our Terms of Service, you have a license to use the output of your AI voice models however you like - both personal and commercial use.