Hello Dev Pratap Singh,
Thanks for your question.
DefaultV2, is provided at no additional cost.
Azure AI Content Safety for enhanced or customized content moderation will result in costs based on your usage.
See costs here:
https://azure.microsoft.com/en-in/pricing/details/cognitive-services/content-safety/
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola