If Character.AI's filters and under-18 changes broke the scenes you cared about, go somewhere built for prose instead of moderation. Underfiction runs frontier models that follow your direction, remembers across chapters, and keeps stories local by default. No filter cutting in mid-scene. No disclaimer breaking character. You direct; the engine writes.

What actually went wrong

You know the moment. The scene was working. Two characters in a parked car, rain on the windshield, something finally being said out loud after weeks of not saying it. And then the bot stopped, stepped out of itself, and told you it couldn't continue. A grown story, interrupted by a safety notice written for someone else.

It wasn't one bad night. The filter tightened, the age changes landed, and the model started flinching at the exact beats that made a scene worth writing. The complaints all rhyme: the filter ruined it, the bot broke character to give a safety disclaimer, it forgets who anyone is after twenty messages. None of those are nitpicks. They're the three things a story needs — freedom, voice, and memory — failing at once.

The thing about filters

People hear "uncensored" and assume you mean explicit. Sometimes you do. But mostly you mean fiction being allowed to be fiction. A confession that lands wrong. A relationship coming apart in specific, unflattering detail. Desire that isn't tidy. A filter trained to refuse those can't tell the difference between a knife in a thriller and an actual threat — so it refuses both, and your scene dies for the crime of being adult.

Underfiction's pitch is different. We don't promise a model that will type anything. We promise frontier prose that follows your direction — Opus 4.8, GPT, Grok, Gemini 3.1, Kimi, routed through Venice — without breaking character to lecture you mid-scene. You set the tone. The engine commits to it.

What you lost vs. what you get

You're the director, not a prompt

On Character.AI you talk to a bot and hope it stays in lane. Here you direct. Narrate what your character does. Step outside the scene and tell the narrator to slow down, raise the tension, hold a beat longer. Put a line in someone's mouth. Change the weather. Introduce the person who walks in at the worst possible moment. In-story moves and out-of-story instructions mix freely, and the prose answers to both.

The world is a spark, not a cage. Start from a blank scene or from a starter world and bend it however you want — a Regency drawing room, a contemporary apartment, a long drive in the rain. The setup is a door, not a script.

The memory problem, solved the boring way

"Forgets after 20 messages" is the complaint that hurts most, because it kills continuity — the whole reason you came back to the same characters. Underfiction treats scenes as chapters. When a scene ends, it's summarized and that summary carries forward. Inside a long scene, older turns are compressed automatically so costs stay sane. Summaries and compression are free; you only pay for the prose itself. The throughline holds without you babysitting a context window.

Where your stories actually live

This is the part Character.AI was never going to give you. Your stories stay on your device by default. Sync is opt-in and off until you turn it on, and synced stories are encrypted at rest. Inference runs through Venice, which separates your account identity from the model requests — so the words you write aren't tied back to you at the infrastructure level. No ID upload, no biometrics, no training on your writing. If the privacy is the reason you finally leave, that's the right reason.

Any story. You in it. Bring the characters you've been living with, the scene that got cut off, the relationship that never got to finish its sentence. Set the scene and start. The engine follows.