For science fiction writers
Plan and write your science fiction novel with AI
Pitch your story in a sentence or two. FictionAI drafts a story bible (world, technology rules, cast, chapter outline) that you edit, then writes each chapter with that bible in view.
3 books free, no credit card. AI use is billed by OpenRouter to your own account.
What you get for a sci-fi book
Rules for your universe
The world card holds your setting, time period, locations and rules: FTL limits, how the AI systems behave, what the colonies can and cannot do. Every chapter is written with them in the prompt.
Hard or soft, your call
Say how rigorous the science should be in the pitch, the world rules or the Fine-tune notes. The model follows what you write there.
A cast with arcs
Crew, factions and antagonists, each with a description, backstory, motivation and arc. Add alien characters the same way.
A chapter outline
A summary, key events and a closing hook for every chapter. Reorder, add or remove chapters before you write.
Series planning
On Pro ($9.99/month), group books into a series with a shared world and cast; each new book is built with them as context.
Genre defaults
Science Fiction, Dystopian and Post-Apocalyptic are built-in genres that pre-fill point of view, tone, story shape, themes and tropes. Change any of them.
Subgenres
Pick Science Fiction, Dystopian or Post-Apocalyptic, or type your own genre, and describe the flavour in your pitch.
Space opera
Tropes such as Space Opera and Generation Ship are in the Science Fiction trope list.
Cyberpunk
Cyberpunk and Virtual Reality are trope chips; add setting details to the world card.
Hard sci-fi
Write the physical limits you want respected into the world rules.
First contact and time travel
Both are trope chips for Science Fiction books.
How it works
- 01
Pitch
Pick a genre and write one or two sentences about the story, or ask for three premise suggestions.
- 02
Story bible
One click builds premise, title, world, cast and outline. Edit anything inline, or regenerate a card with an instruction.
- 03
Write
Generate a chapter, continue from the cursor, rewrite a passage or revise, chapter by chapter.
- 04
Export
Download the manuscript as DOCX, PDF, Markdown, plain text or HTML.
Questions
Can AI write hard sci-fi?
It can draft it if you give it the constraints. Put the science you want respected (no faster-than-light travel, realistic travel times, energy limits) in the world rules; every chapter is written with them in the prompt. Check the science yourself: models can still get physics wrong.
How does FictionAI maintain tech consistency?
Through the story bible. Your world rules, cast and outline, plus the saved text of earlier chapters, go into each chapter prompt. There is no automatic contradiction checker; the editorial review gives book-wide feedback you can act on.
Does it support space opera series?
Yes, on Pro. A series has its own outline, cast and world, and each book in it is planned with the series world and cast as context.
What sci-fi subgenres work best?
Science Fiction, Dystopian and Post-Apocalyptic are built-in genres with their own defaults, and trope chips cover space opera, cyberpunk, first contact, time travel and more. Any other subgenre works if you name it in the genre field and pitch.
Can I build alien civilizations?
Yes, as part of your world card and cast: describe the species, their culture and technology in the world rules or as characters. There is no separate species builder.
Start your sci-fi novel
Build a story bible from a two-sentence pitch and write the first chapter today.