If you’re inspired to create your own AI‑generated historical fantasy novel—perhaps a tale of Boudicca as a mech‑warrior or Leonardo da Vinci as a clockwork sorcerer—you’ll need the right tools. Not all AI writing platforms are equal when it comes to long‑form fiction, and some are particularly well‑suited to blending historical accuracy with fantastical creativity. Here are the best AI writing tools fiction authors are using.
1. Claude (Anthropic): Many AI fiction authors consider Claude the best option for long‑form storytelling. Its large context window allows it to “remember” character details, plot points, and historical facts across very long conversations—essential for novel writing. Claude is particularly strong at maintaining tone and avoiding the generic “AI voice” that plagues some tools. For Claude creative writing, detailed prompting yields remarkably coherent and creative results.
2. ChatGPT (OpenAI): The most widely used AI writing tool. GPT‑4 and GPT‑4 Turbo are excellent for brainstorming, scene generation, and dialogue. With carefully structured prompts, ChatGPT historical fiction can produce engaging narrative. The key is iterative prompting—building the story scene by scene with constant human guidance.
3. Sudowrite: A specialized AI fiction writing platform built on top of GPT models. Sudowrite offers features designed specifically for novelists: beat sheets, character development tools, and a “story engine” that can generate plot twists. For Sudowrite fantasy projects, its genre‑aware suggestions are particularly useful.
4. NovelAI: A platform designed specifically for creative writing with less content restriction than general‑purpose AIs. It’s popular in the AI fiction community for generating more unpredictable and creative output.
Choosing the Right Tool for Your Project: For authors who want maximum control and the most natural prose, Claude is often the top choice. For those who want specialized fiction‑writing features, Sudowrite is worth the subscription. For beginners wanting to experiment, ChatGPT’s free tier is the best starting point.
To see the creative output these tools enable, explore our curated lists of AI historical fantasy books and medieval fantasy AI books. For the ethical considerations of using these tools, read AI book ethics. And for a look at where AI authorship is heading, see the future of AI fiction.