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Monthly Plans

Subscribe monthly. Bring your OpenRouter key. You control model usage and choose between Haiku, Sonnet, and Opus.

Create a free account. No card to explore. Bring your OpenRouter key for generation.

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Starter

$39/ month

10 chapters/month

$3.90 per chapter

Best for: Hobbyist writers exploring AI-assisted fiction

  • 10 chapters per month
  • Claude Opus 4.7, Claude Sonnet 4.6, and Claude Haiku 4.5
  • programmatic analyzer suite
  • 17 chapter-generation steps
  • 25-step programmatic enforcer chain
  • Voice Studio
Popular

Creator

$99/ month

30 chapters/month

$3.30 per chapter

Best for: Active writers producing 1-2 novels per month

  • 30 chapters per month
  • Claude Opus 4.7, Claude Sonnet 4.6, and Claude Haiku 4.5
  • programmatic analyzer suite
  • 17 chapter-generation steps
  • 25-step programmatic enforcer chain
  • 2,110-entry craft library
  • Voice Studio

Pro

$199/ month

100 chapters/month

$1.99 per chapter

Best for: Prolific authors and publishing teams

  • 100 chapters per month
  • Claude Opus 4.7, Claude Sonnet 4.6, and Claude Haiku 4.5
  • programmatic analyzer suite
  • 17 chapter-generation steps
  • 25-step programmatic enforcer chain
  • 2,110-entry craft library
  • Voice Studio
  • Priority support

Studio

$299/ month

200 chapters/month

$1.50 per chapter

Best for: Studios and high-volume production

  • 200 chapters per month
  • Claude Opus 4.7, Claude Sonnet 4.6, and Claude Haiku 4.5
  • programmatic analyzer suite
  • 17 chapter-generation steps
  • 25-step programmatic enforcer chain
  • 2,110-entry craft library
  • Priority support
  • Voice Studio
  • Team features (coming soon)

BYOK confidence calculator

See what creates model spend before you start.

This is a relative spend planner, not a provider quote. The in-app estimator uses the current model registry before generation; OpenRouter bills your key directly.

Chapter drafting
9
relative spend units
Revision work
4
relative spend units
Voice Studio
0
relative spend units
Retry/cache buffer
4
relative spend units
Estimated pressure: 17 units

To avoid surprise spend: prototype with Haiku, keep early runs short, check OpenRouter balance before long jobs, read the estimate before generation, and expect retries/cache state to move real cost up or down.

60-second proof tour

Premise to export, with control and cost points visible.

01

Premise

A concrete seed idea becomes source material, not prompt confetti that vanishes after one chat turn.

Control

Writer supplies, edits, or rejects the premise before machinery starts.

No paid generation is required to read this public demo.

02

Planning board

FictionOS turns the idea into a causal map: architecture, characters, POV, stakes, memory, and chapter plans.

Control

Writer reviews the spine before chapter prose starts.

Planning uses the connected OpenRouter key when run in-app.

03

Voice profile

Voice Studio can compare generic output against profiled author voice so style is not a mood board.

Control

Writer uploads, tests, refines, attaches, pauses, or deletes the profile.

Voice rebuild/test calls use BYOK and are visible before use.

04

Chapter draft

Chapter writing runs through the registry-driven production pipeline, not a blank chat box with amnesia.

Control

Writer chooses tier, mode, chapter count, direction notes, and when to stop.

Chapter cost varies by model, length, retries, cache, and revision work.

05

Quality finding

Programmatic checks look for repetition, explainy prose, cliches, rhythm collapse, and regression drift.

Control

Writer can accept, rewrite, inspect, or export instead of being trapped in auto-polish.

Programmatic enforcers are designed to avoid extra model calls.

06

Revision patch

Review produces auditable targets with approval, rejection, quote, and history rails before finished prose moves.

Control

Writer can run audit-only, guided revision, or controlled automation with a veto.

Revision should quote before mutating finished prose.

07

Export

Work leaves as manuscript, DOCX, TXT, EPUB, analysis, architecture, or JSON backup.

Control

Writer keeps portable copies and can delete projects.

Export is not an LLM spend event.

FictionOS should be judged by artifacts, not slogans: a plan you can inspect, a voice you can test, chapters you can read, revision targets you can approve, and exports you can keep. The author keeps taste, voice, veto power, and final judgment.

Bring Your Own Key

All plans require your own OpenRouter API key. You pay AI costs directly to OpenRouter - we never markup model usage. FictionOS routes public work through the current supported Anthropic tiers.

Claude Haiku 4.5
Lowest-cost exploration

Testing premises, voice experiments, and cheap canaries.

Claude Sonnet 4.6
Default drafting balance

Most long-form drafting where cost, speed, and quality all matter.

Claude Opus 4.7
Premium quality tier

High-stakes chapters, literary voice, and final-quality passes.

Configure Your Key

Frequently Asked Questions

How does pricing work?

Can I try FictionOS without a card?

What is BYOK (Bring Your Own Key)?

Can I switch plans?

What happens if I hit my chapter limit?

How long does generation take?

Ready to Write Your Novel?

Create your account, connect OpenRouter, and control generation spend yourself.

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