As of my last knowledge update in October 2021, many AI text-to-image generation platforms implement some level of content moderation and censorship to ensure compliance with legal and ethical standards. This means that fully uncensored options may be limited.
Some platforms known for their more open approaches include:
1. **DALL-E 2** - Developed by OpenAI, while it does have restrictions, it is one of the leading models in text-to-image


