Best AI chat for Interactive Fiction

Interactive fiction sits between roleplay and traditional writing. The author controls the world, the AI generates the prose, and the reader (often also the author) makes choices that branch the narrative. Tools optimised for this format ship features general chat doesn’t:

Author vs. character separation — explicit framing so the AI knows when “you” are the writer vs. the protagonist. AI Dungeon’s narrator mode and DreamGen’s story mode both formalise this distinction.

Generation at scene scale, not message scale — retry the last paragraph, not the last sentence; expand a beat into a full scene; collapse three exchanges into a summary. Tools that handle these operations natively beat tools that pretend each AI reply is a chat message.

Story memory + lorebook — separate from chat history, queryable by keyword, persistent across sessions. NovelAI pioneered the format; the featured platforms below all ship variants.

Model choice for narrative coherence — short-context strong models often fail at 10-paragraph coherence. NovelAI fine-tunes its own narrative-optimised models; DreamGen lets you pick; Agnai works with any API.

The featured platforms split into two camps:

Closed, narrative-focused: NovelAI and AI Dungeon ship polished writer’s-workshop UIs and curated models.

Open or BYO-API: DreamGen, FictionLab, and Agnai let you bring your own model and configure the writing experience around it.

If you are a casual storyteller, AI Dungeon is the lowest-friction entry. If you are a serious author, NovelAI for the curated experience or DreamGen for model freedom.

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