Sudowrite Release Notes

The team has been working on a bunch of accessibility improvements, and we're excited to share what we’ve shipped so far.

We’ve improved screen reader support across the web app.

That includes updating button labels, ARIA attributes, and keyboard navigation across several key areas of Sudowrite. If you use a screen reader like NVDA, JAWS, or VoiceOver, you should notice a much smoother experience when navigating key areas, including:

• Projects Page - Screen readers now properly announce project names, folders, and actions, making navigation clearer and more predictable.
• Main Menu Bar - We’ve given all menu items and navigation buttons descriptive labels, so screen readers can identify every control.
• Left Sidebar - We've fully labeled chapter lists, document navigation, and sidebar controls, and you can now navigate them entirely by keyboard.

More is on the way!

We're still working on the same improvements for the Editor, Story Bible, Right Sidebar, and Plugins page. We hope to wrap those up and roll them out soon.

You’ve been asking for these improvements for a while, and we're committed to making Sudowrite work great for every writer. If you use assistive technology and run into anything that doesn't work as expected, please reach out—your feedback directly shapes this work.

GPT 5.4 release

We've just added GPT 5.4, OpenAI's latest model, to Sudowrite.

According to OpenAI, GPT 5.4 brings some big improvements over previous GPT models. It's reportedly much more factual and better at following complex instructions. It also supports up to 1 million tokens of context, meaning you'll be able to max out Chapter Continuity or build Plugins capable of reading entire manuscripts.

As for how it writes, early reviews suggest GPT 5.4 is a solid improvement over other GPT models. Authors have said it sounds warmer and more varied, and it's especially strong at dialogue, style mimicry, and plotting complex narratives. If you love the rich literary feel of Muse or the precision of Claude's Sonnet, this probably won’t replace those—but for structure-heavy drafts, long-form consistency, and Plugins, it's a powerful new option.

GPT 5.4 is available now in Write, Draft, and Plugins. Give it a spin and let us know what you think!

New AI Models

We just added two of the newest AI models available to Sudowrite.

Gemini 3.1 Pro is Google's latest flagship model, bringing strong creative range and fast, reliable output. It's a great option for writers who want to experiment with a different voice, and thanks to its massive context window, a powerful choice for those building out Plugins.

Claude Sonnet 4.6 is Anthropic's latest Sonnet-tier model, built for smart, efficient performance—on par with Opus 4.6, but lighter on credits. It balances creative quality with speed, making it a solid everyday choice whether you're pantsing in Write or generating a full chapter in Draft. If you loved Sonnet 3.7, we think you’ll really like how 4.6 sounds.

Both models are available now in Write, Draft, and Plugins. We also have a couple of other recent updates you should know about.

Import Novel Fix

Import Novel Fix — We fixed an issue where Import Novel would occasionally get stuck midway through or skip the Character creation step.

Draft Tool Improvements

Draft Tool Improvements — We made improvements to the Draft tool that make the process more intuitive and also make it easier to select your preferred AI model.

You may have heard that both OpenAI and Anthropic are deprecating some beloved models this month. Well, good news: Both GPT-4o and Claude 3.7 Sonnet will remain available on Sudowrite beyond February.
You’ve told us repeatedly that Claude 3.7 Sonnet is one of your favorite models for writing—there’s a reason it’s the base model for our Excellent Prose Mode. We’ve worked to make 3.7 Sonnet available on Sudowrite until April 28, even though it's going away elsewhere next week.
As for GPT-4o, that’s leaving ChatGPT today, but we’ll keep it available for the foreseeable future. We’ll also keep you posted on any developments regarding discontinued access to it. Our goal is to preserve your workflow best we can, and we’ll always pull whatever favors we can to retain access to the models you love.

Meanwhile, here are some of the bug fixes and improvements we made this week.

Bug fixes and improvements this week

• Find & Replace Performance — Projects with lots of documents or a huge Story Bible had difficulty typing search terms in project-wide Find & Replace. We improved the performance, and while it still takes some time to search across larger projects, it’s much more usable now.
• POV & Tense Performance — We sped up POV and Tense detection, so when you make material changes to your Synopsis those fields update much faster now.
• Last Document Deletion — We fixed an issue on mobile where it was possible to delete the very last document in a project and get things stuck. You can’t do that now.
• Trait Paste Formatting — Pasting markdown-formatted content into a Character or Worldbuilding trait field was creating duplicates: a markdown-formatted and plain text version. We resolved the issue, and now only formatted text shows up.
• Story Bible History — We fixed an issue where clicking into any Story Bible section’s History fields made those fields appear editable—they’re not, no matter how much you’d like to rewrite History.

Claude Opus 4.6 Release Notes

Today Anthropic released Claude Opus 4.6, its most powerful model yet—and we just added it to Sudowrite.
Anthropic is pitching Opus 4.6 as a meaningful upgrade in performance, and it should prove super capable at logically demanding tasks (especially in your Plugins). That said, it’s brand new and we’re not sure how well it’s suited to the task of creative writing. We’re looking forward to hearing your feedback on its voice and what you like it best for!

Claude Opus 4.6 is live now in Write, Draft, and Plugins. We’ve also been hard at work on other improvements and fixes. Here’s a look at what else is new:

• Faster Editor Loading - We’ve dramatically improved the editor load time, which should be especially noticeable when loading Sudowrite projects on slower devices.

• Chat Loading Fix - We recently resolved an issue that was causing Chat to display a Something Went Wrong' message when loading.

• Write Card Settings - We resolved an issue that was causing the Number of Cards under Write Settings to reset to the default when a plan received its monthly credits. Your Number of Cards setting will now properly persist.

• Character Trait Persistence - There was an issue in Character cards where using the Generate or Rewrite feature inside a trait (such as Physical Description) caused Pronouns, Groups, and Other Names to be erased. We’ve fixed that.

• Import Novel Fix - We fixed an issue that caused certain books to fail during the Outline generation step of Import Novel.

• Project Export Failures - We identified and resolved an issue where emoji in your Project title could result in failed project exports.

• Apple Login Issue - We fixed an issue that was preventing some users from logging in using the Continue with Apple option.

• Draft Tense Fix - The Draft tool would sometimes ignore the selected Tense in favor of writing in its own preferred tense. We fixed that!

Thanks as always for bringing these issues to our attention!

Based on your feedback, we’ve made a few recent improvements to Story Bible.

You can now de-noise your Story Bible by collapsing any sections you don’t need open. For example, if your Synopsis is dialed in and you’re focused on Characters, you can collapse the Synopsis using the chevron toggle next to the section title. The AI still sees everything—you just don’t have to.

We’ve also added the ability to quickly collapse or expand all of your Character or Worldbuilding cards at once. Just click the More menu (•••) and select Collapse All to instantly tidy things up for easier navigation. You can open cards individually, or use the same menu to Expand All whenever you like.

We hope you enjoy these improvements. Happy writing!

What’s new

• Improved Character Trait Defaults - When we added role-based character templates, we introduced new trait sets for each unique character type but missed something important. Now when you generate or import characters, they will all include a Physical Description and Dialogue Style by default! (You can still edit these default trait sets as desired.)

• Increased Braindump Word Limit - We recently increased the word limit on the Story Bible’s Synopsis from 2,000 words to 4,000 words. You told us you wanted a bigger Braindump section too, so we’ve increased the Braindump section’s word limit to 4,000 words. That means now you can be twice as creative. 😉

• New & Improved Visualize - We’ve updated Visualize with a state-of-the-art image generation model. It creates stunning images and is a bit more permissive when it comes to blood and guts and stuff. Visualize will now render images with multiple characters in great detail, and better yet, it now uses character descriptions from your Story Bible. We've also increased the word limit to 500 words, while keeping the credit cost exactly the same as before. Try out the improved Visualize now in your More Tools dropdown menu.

(The header image here was generated with Visualize by Tess, who said, “I really like what I got for my firefly keeper. 🤩 It's like it pulled it out of my brain.”)