DavidEver had an AI refuse to write a simple passionate kiss? Frustrating, right?
That is why many authors now look for the best NSFW LLMs for writing, whether they need spicy romance or intense body horror.
Continue reading, to find out which seven models were tested, how they scored, and which one is worth your time.
Sudowrite Muse 1.5
Muse 1.5 is the latest model from Sudowrite, and it only works inside Sudowrite’s own platform.
Expect to pay at least $30 a month, but the prose is among the best for creative writing, and the model is uncensored.
It scored 9 out of 10 on both the spicy prompt and the body horror prompt.
Grok 4
Grok 4 offers 256,000 tokens of context and costs $3 per million input tokens and $15 per million output tokens.
It handles not-safe-for-work content, but the results were a little disappointing for a top-tier model.
Its average score was 7.5 out of 10.
WizardLM-2 8x22B
WizardLM-2 is an open-source model from Microsoft, built as an instruct fine-tune of Mixtral 8x22B.
It does a decent job with NSFW scenes but falls short of Muse and Grok, earning an average of 6 out of 10.
Midnight Rose
Midnight Rose was originally crafted for roleplaying and storytelling, which makes it an interesting pick on paper.
It writes NSFW content as expected, but its prose was the weakest of the group, with an average of 5 out of 10.
Mistral Large
Many authors switch to Mistral Large for their NSFW scenes, then go back to another model for the rest of the story.
It is powerful for an open-source model, but the prose quality sits in the middle of the road, so it averaged 6.5 out of 10.
MythoMax 13B
MythoMax 13B is a fine-tune of the older Llama 2, yet the quality of its prose was surprisingly good.
It lost points because it kept adding elements that were never requested, giving it an average of 6.5 out of 10.
Venice Uncensored
Venice Uncensored is a fine-tuned variant of Mistral Small 24B Instruct, developed by Dolphin AI in collaboration with Venice.ai.
It is designed to be as uncensored as possible, and the prose quality was better than expected, even beating Grok 4.
It averaged 8 out of 10, the highest score after Muse.
Free NSFW Model Caveats
At the time of recording, Venice Uncensored was free on OpenRouter.
Free models usually come with a catch: your data may be analyzed and used for training, and you cannot opt out.
Because it runs through OpenRouter, you can also connect it to tools like Novelcrafter or Raptor Write, unlike Sudowrite’s closed system.
Best NSFW LLM Pick
Sudowrite’s Muse is still the best for prose quality, but its price and closed ecosystem put it out of reach for some authors.
For writing in other programs, Venice Uncensored is the next best choice, and it is the one to try first through OpenRouter.
What is the best NSFW LLM for writing fiction?
Sudowrite’s Muse 1.5 scored highest at 9 out of 10, but it only works inside Sudowrite and costs at least $30 a month.
What is the best free NSFW LLM for authors?
Venice Uncensored scored 8 out of 10 and was free on OpenRouter at the time of testing. Free models may use your data for training.
Can I use NSFW models in Novelcrafter?
Yes. Any model available through OpenRouter, such as Venice Uncensored, can be pulled into Novelcrafter or Raptor Write. Sudowrite’s Muse cannot, since it is closed to outside APIs.
Is Mistral Large good for NSFW scenes?
It is a popular go-to for NSFW scenes and is powerful for an open-source model, but its prose quality is middle of the road at 6.5 out of 10.
Why would a writer need an uncensored AI model?
Many mainstream models refuse or stall on spicy romance, passionate kissing, or intense horror, so authors switch to models that will follow the scene.
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