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Best AI book writing software in 2026

Compare AI book writing tools for planning, drafting, editing and feedback: Sudowrite, Novelcrafter, ChatGPT, Claude and Connections Writing.

By Uncommon Comforts ยท

Uncommon Comforts is published by the team behind Connections, whose products are compared here alongside other tools.

AI book writing software can help with planning, drafting, editing, or organizing a book. The right choice depends on the type of writing help needed. Compare what each tool says it does against the writing stage that needs support.

OptionPricing detailsWriting help
Connections WritingConnections Free costs $0, and going over a limit stops the feature rather than billing you. [1] Connections Pro, the first paid plan, is $39.99 a month and brings premium across every Connections product. [1]The AI writes a chapter one section at a time, showing progress as it goes. [1] A free proofread flags repeated words, straight quotes, missing apostrophes, double spaces, a/an mistakes, passive voice, wordy phrases and spelling. [1]
SudowriteThe Hobby & Student plan costs $10 per month. [2] Sudowrite's Professional plan costs $22 per month. [2]The Write feature suggests the next 300 words in the user's voice. [3] The Feedback feature gives five actionable areas to improve. [3]
NovelcrafterPlans start from 4 USD per month with no credit card required. [4] The Scribe plan costs $4 USD monthly. [5]The Codex automatically keeps track of and links characters, places, lore and more. [4] Your Codex can be shared across books in a series. [4]
ChatGPTChatGPT has individual and business or enterprise pricing plans. [6] Its Go, Plus, Business and Enterprise plans are paid per user per month. [6] ChatGPT Free has limited messages with uploads. [6]ChatGPT Free includes everyday text chats. [6] Free includes limited image creation and limited deep research. [6] [6]
ClaudeClaude Max starts from $100 per month. [7] Enterprise seat price is in addition to usage charged at API rates. [7]Claude Code is included in all paid plans. [7] Pro gives at least 5x more usage per 5-hour session than Free. [7] Max gives 5x or 20x more usage per 5-hour session than Pro. [7]

How to read this list

The options below all relate to writing with AI, but they focus on different parts of the process. Sudowrite describes itself as an AI writing partner for fiction. [3] Novelcrafter connects to an AI platform of your choice or runs models on your own machine. [4] ChatGPT offers a free version available to everyone. [6] Every Claude plan has usage limits that reset on a rolling five-hour session window. [7] Some tools describe writing support, and some describe keeping story information organized. [4] Compare what each option says it does, then match those details to the writing stage that needs support. Check current details before choosing, especially around usage limits, workflow, and the type of feedback needed.

Connections Writing: plans, writes and edits a book

Connections Writing is made by the team that publishes this site. You write down a premise and how the book should sound, and the book is planned out chapter by chapter. [1] The AI writes a chapter one section at a time, showing progress as it goes. [1] You select a passage, then choose an action, such as an edit. [1] A free proofread flags repeated words, straight quotes, missing apostrophes, double spaces, a/an mistakes, passive voice, wordy phrases and spelling. [1] An AI check of a chapter looks at grammar, punctuation, spelling and clarity, and checks continuity against the story bible and earlier chapter summaries. [1] An entry in the story bible reaches the AI only when the passage mentions its name or an alias. [1] You can run up to five AI readers, each a different kind of person, and they report where they got lost. [1]

Sudowrite: writing help for fiction

Sudowrite describes itself as an AI writing partner for fiction. [3] Its Write feature suggests the next 300 words in the user's voice. [3] Its Feedback feature gives five actionable areas to improve. [3] Sudowrite offers eight themes and five dark modes. [3] Sudowrite says its plugins give 1,000+ new ways to write and get feedback. [3] Sudowrite says it was founded by writers Amit Gupta and James Yu. [3]

Novelcrafter: story tools that organize information

Novelcrafter lets you connect to an AI platform of your choice or run models on your own machine. [4] The Codex feature automatically keeps track of and links characters, places, lore and more. [4] Your Codex can be shared across books in a series. [4] Novelcrafter offers collaboration options, including teams for writing groups. [4] You can build your own shortcuts with a customizable prompting system. [4] Novelcrafter says it was built by writers, without venture funding. [4]

ChatGPT: a general AI assistant

ChatGPT offers a free version available to everyone. [6] It also provides limited file uploads. [6] ChatGPT says all data is encrypted in transit using TLS 1.2. [6] For book writing, check what any plan allows for long text, file uploads and research.

Claude: an AI assistant with paid options

Every Claude plan has usage limits that reset on a rolling five-hour session window. [7] Subscribers can cancel anytime and the plan stays active until the end of the current billing period. [7] For writing a book, check what a plan allows for long passages and repeated sessions.

How to choose

Choose based on the writing stage that needs help. For a book project that starts with a premise and needs a chapter plan, Connections Writing describes a process that turns a premise into a chapter-by-chapter plan. [1] For drafting sections, it describes AI chapter writing that shows progress as each section is written. [1] For checking what was written, it describes an AI check of grammar, punctuation, spelling and clarity, plus continuity against the story bible. [1] For early reader reaction, it describes up to five AI readers that report where they got lost. [1]

For fiction drafting, Sudowrite describes its Write feature for generating the next words and a Feedback feature for finding areas to improve. [3] [3] For story information that needs to stay organized across books, Novelcrafter describes its Codex and sharing features. [4] [4] For general text help, ChatGPT offers a free version, and every Claude plan has usage limits that reset on a rolling five-hour session window. [6] [7]

Check each tool's current details before choosing, especially around usage limits, long-passage handling, and the type of feedback needed.

Frequently asked questions

Is AI book writing software useful for planning a book?

Some tools describe features for planning a book before drafting starts. Connections Writing lets you enter a premise and how the book should sound, then creates a chapter-by-chapter plan. [1] Sudowrite describes itself as an AI writing partner for fiction. [3] See what each option says about planning before choosing.

Can AI book writing software help write chapters?

Connections Writing describes AI chapter writing where a chapter is written one section at a time and progress is shown as it goes. [1] Sudowrite's Write feature suggests the next 300 words in the user's voice. [3] Other tools may describe different writing features, so check the feature details for the type of help needed.

Does Sudowrite help with fiction writing?

Sudowrite describes itself as an AI writing partner for fiction. [3] Its Write feature suggests the next 300 words in the user's voice. [3] Its Feedback feature gives five actionable areas to improve. [3] Sudowrite offers eight themes and five dark modes. [3]

Can ChatGPT be used for book writing tasks?

ChatGPT offers a free version available to everyone. [6] ChatGPT Free provides limited file uploads. [6] Check what any plan allows for long text before relying on it for a book.

How should a writer compare AI book writing tools?

Compare the features that matter for the writing process, such as planning, drafting, editing, and feedback. Connections Writing describes story checks, reader feedback, and version history features for book work. [1] [1] [1] Novelcrafter describes keeping story information organized. [4] Match those to the writing stage that needs support.

Writing is free to start, and AI use is limited by a weekly allowance. [1] Connections Business Plus costs 19999 cents ($199.99) a month. [1]

Try Connections Writing

Sources

  1. Connections Writing's own description of itself (the product of this site's publisher)
  2. Sudowrite, sudowrite.com/pricing, read 2026-10-08
  3. Sudowrite, sudowrite.com, read 2026-10-08
  4. Novelcrafter, novelcrafter.com, read 2026-10-08
  5. Novelcrafter, novelcrafter.com/pricing, read 2026-10-08
  6. ChatGPT, chatgpt.com/pricing, read 2026-10-08
  7. Claude, claude.com/pricing, read 2026-10-08

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