ChatGPT vs Sudowrite

ChatGPT

• General-purpose help with writing, questions and brainstorming
• People who want chat, voice, images and web search in one assistant
• Trying an AI assistant at no cost before paying

Sudowrite

• Novelists who want AI help drafting and revising fiction
• Planning a book from premise to a chapter-by-chapter outline
• Writers who want to choose between fiction-tuned and general AI models

ChatGPT

• Pro is sold at three price points, $100, $200 or $500 per month, well above the $20 Plus plan.
• Business requires at least 2 users. SCIM, EKM and role-based access control are reserved for Enterprise and Edu.
• OpenAI began testing ads in the free version for logged-in adult US users in January 2026, according to Wikipedia.
• OpenAI's pricing page says the Go plan may include ads.

Sudowrite

• There is no free plan. Without a paid plan the AI features stop, though projects stay accessible and exportable.
• Use is metered in credits rather than words: the docs say 1 million credits may produce anywhere from 50,000 to 500,000 AI words.
• Unused credits expire monthly on Hobby & Student and Professional. Only Max rolls them over, for up to 12 months.
• The mobile apps are companions: series management and several other web features are not available in them.

ChatGPT

Conversational help

Answers questions, drafts and reworks text, explains topics and reads uploaded photos in a chat, with history synced across your devices.

Image generation

Creates original images from a description, or transforms existing images from a short instruction.

Advanced Voice Mode

Hold a real-time spoken conversation in the mobile app by tapping the soundwave icon.

Search and Deep Research

ChatGPT Search draws on the web for more up-to-date answers, and Deep Research generates a report from extensive web searches.

Codex

A coding agent that runs on the web, in a CLI, in an IDE extension and on iOS from the Plus plan, with integrations such as automatic code review and Slack.

GPTs and agents

GPTs customize ChatGPT's behavior for a specific use case, and ChatGPT agent carries out multi-step tasks.

Sudowrite

Write

Reads the characters, tone and plot so far and suggests roughly the next 300 words in the author's voice, with more than one option to pick from.

Story Bible

Works step by step from an idea through synopsis, characters, worldbuilding and outline to chapter beats, then drafts scenes from them in the author's style.

Describe, Expand and Rewrite

Describe adds detail that places the reader in a scene, Expand builds out passages that feel rushed, and Rewrite revises a selection to the direction given.

Feedback

Reads a draft and returns areas to improve. The docs list Feedback, covering developmental edits, line edits and beta reads, as exclusive to Professional and Max.

Chat and plugins

A chat assistant aimed at novelists handles brainstorming, research and edits, and a library of more than 1,000 plugins adds other tasks. Users can build their own plugins.

Mobile companion apps

iOS and Android apps centered on Smart Dictation and chat, with Write and Rewrite included. Projects sync with the web app and credits are shared.

ChatGPT

• Free$0

  Unlimited text chats, with limits on uploads, image creation, voice chats, deep research and memory.

• Go$8

  per month

  More messages with tools, more uploads, image creation and voice chats than Free, and longer memory. OpenAI notes this plan may include ads.

• Plus$20

  per month

  Advanced reasoning models, expanded deep research and memory, plus projects, scheduled tasks and custom GPTs.

• Business$20

  per user / month, billed annually

  For 2 or more users: a dedicated workspace with admin controls, SAML SSO and MFA. $25 per user / month when billed monthly.

• ProFrom $100

  per month

  A choice of three usage tiers at $100, $200 or $500 per month, with the highest limits, pro reasoning and an always-on agent.

• Enterprise & EduCustom

  Sold through sales, with priority request processing, SCIM, EKM, user analytics, domain verification and role-based access control.

Sudowrite

• Hobby & Student$10

  per month, billed annually ($19 billed monthly)

  225,000 credits a month with the writing tools, chat and every model, but not Feedback. Unused credits expire each month.

• Professional$22

  per month, billed annually ($29 billed monthly)

  1,000,000 credits a month (the pricing page also displays 450,000 beside it), plus Feedback: developmental edits, line edits and beta reads.

• Max$44

  per month, billed annually ($59 billed monthly)

  2,000,000 credits a month, and unused credits roll over for up to 12 months while the subscription stays active.

ChatGPT

• Annual discount

  Business is cheaper when billed annually

  OpenAI's pricing page lists Business at $20 per user / month when billed annually, against $25 per user / month when billed monthly.

Sudowrite

• Annual discount

  Up to 50% off with yearly billing

  Paid annually, Hobby & Student is $10 a month against $19 monthly, Professional $22 against $29 and Max $44 against $59. The pricing page labels yearly billing as up to 50% off.