Sudowrite
by Sudowrite
Fiction-first AI coauthor to outline, draft, and deepen stories
About
Sudowrite is an AI-powered writing assistant purpose-built for fiction and narrative prose, rather than general business copy. It runs in the browser and is designed to sit alongside your drafting process, acting like an always-available co-writer that can continue scenes, deepen description, or offer alternate phrasings while preserving your voice. The core experience centers on long-form storytelling—novels, novellas, short stories, and screenplays—where structure, character, and style matter as much as raw word generation. One of Sudowrite’s flagship capabilities is its Story Engine, a guided workflow for planning and drafting a book chapter by chapter. You feed it a premise, key characters, and a rough synopsis, and it generates outlines, scene ideas, and possible twists, which you can then iteratively refine as you draft. Complementary tools like Canvas and the Story Bible help you keep track of worldbuilding, character details, and continuity across a complex work, so the AI can stay consistent with earlier choices over long projects. For line-level work, Sudowrite provides specialized tools such as Write, Rewrite, Describe, and Show, Not Tell. The Write feature continues your prose in context, extending a scene in your style when you highlight text and ask it to carry on. Rewrite offers multiple alternative versions of a paragraph—shorter, longer, more descriptive, more intense, or with more interiority—so you can compare and selectively adopt changes. Describe generates rich, multi-sensory descriptions of nouns or settings you highlight, while Show, Not Tell transforms flat, expository sentences into dramatized beats that convey emotion and subtext through action and detail. Under the hood, Sudowrite combines its own custom models (like the fiction-focused Muse model) with major frontier models such as GPT-4 and Claude, letting you switch between speed, cost, and creativity depending on the task. All subscription tiers unlock the full feature set; the main difference between plans is the monthly pool of AI credits and whether they roll over, making it suitable for everyone from hobbyists drafting a first novella to high-output authors publishing multiple books per year.
What you can do with it
- Plan and outline a novel with the Story Engine, from premise to chapter-by-chapter beats
- Expand bare-bones scene drafts into vivid, sensory-rich prose using Describe
- Rewrite awkward paragraphs in multiple styles while keeping character voice consistent
- Brainstorm plot twists, character motivations, and worldbuilding details for a fantasy or sci-fi series
- Use Write and inline suggestions to continue stalled scenes and overcome writer’s block during drafting
Pricing
Hobby & Student — $10/mo billed annually or $19/mo billed monthly, 225,000 credits/month Professional — $22/mo billed annually or $29/mo billed monthly, 1,000,000 credits/month Max — $44/mo billed annually or $59/mo billed monthly, 2,000,000 rollover credits/month
How to access
Primarily a web-based app at sudowrite.com with open self-serve signup using an email account; users write or paste manuscripts into the browser editor and invoke AI tools like Story Engine, Describe, and Rewrite inline, with no separate API, mobile app, or desktop client publicly advertised; upgrades to paid tiers are handled through a self-serve checkout on the pricing page.
Access via web app at sudowrite.com with email-based account signup and login; start with a limited free trial (no credit card required) before upgrading to a paid plan; all paid tiers unlock the full feature set with differences only in monthly credit allowances.
Tips for getting the best results
Start by creating a project in the web app and either pasting in your existing manuscript or drafting directly in Sudowrite’s editor; this keeps the AI aware of your characters, tone, and plot so suggestions stay on voice. Use the Story Engine early in a project to expand a premise into a chapter-by-chapter outline, iterating on proposed beats until the high-level structure feels right before drafting full scenes. While drafting, highlight specific paragraphs or sections and invoke tools like Write to continue in your voice, Describe to enrich sensory details, or Rewrite to explore alternate phrasings or tones—treat these as options to edit and curate, not text to accept wholesale. Maintain a robust Story Bible with character sheets, locations, and timeline notes so the AI can reference consistent lore; periodically update it as plot details change to reduce continuity errors. Watch your credit usage by reserving heavier generations (long scenes, multi-variant rewrites) for sections where you are genuinely stuck, and rely on shorter, targeted prompts elsewhere; testing different underlying models (e.g., Muse versus GPT-4 or Claude) on the same passage can reveal which combination gives the best balance of creativity and control for your specific genre.
Known limitations
Sudowrite does not function as a full publishing stack: it lacks native export to formats like PDF, EPUB, or DOCX and offers no built-in cover design, audiobook creation, or sales/distribution tools, so you must move manuscripts into other software for formatting and publication. Its output quality, while strong for fiction, still requires substantial human editing to maintain voice, fix repetition, and resolve plot logic issues; relying on it to auto-generate entire chapters can lead to flat or derivative prose and continuity errors. The credit-based pricing model can make heavy iterative use expensive, particularly on lower tiers, and managing credits may push users to under-experiment or to accept weaker drafts to avoid overuse. Because it is web-based, it depends on a reliable internet connection, and there is no offline mode; it also does not currently expose a public API or deep integrations with tools like Scrivener or Word, so workflows that require tight integration with existing writing environments may feel fragmented. As with all LLM tools, it cannot guarantee uniqueness or absence of unintentional similarity to existing works, so authors remain responsible for originality, rights clearance, and adherence to publisher or platform policies.
Model / Technology
Mixture of proprietary fiction-tuned LLMs (e.g., Muse, Goliath) and third-party large language models such as GPT-4 and Claude behind a long-form, story-focused web interface
Commercial use
Sudowrite positions itself as a tool for authors to create and publish fiction; its public materials and reviews indicate that paying users can commercially exploit the works they produce with it, but users retain responsibility for rights, originality, and compliance with platform terms and any applicable publisher requirements, and should review Sudowrite’s current Terms of Service for specific licensing language or jurisdiction-specific restrictions.
Training data
Sudowrite’s proprietary Muse and Goliath models are described as being fine-tuned specifically for creative writing on top of large language model foundations; publicly available reviews note that it combines these in-house models with general-purpose models such as GPT-4 and Claude, implying training on a mixture of licensed, synthetic, and large-scale text corpora typical for modern LLMs, though Sudowrite does not publish a detailed dataset list and there are no widely reported controversies uniquely tied to its training data.