Anthropic just released their latest, greatest models yet: Claude 4 Sonnet and Claude 4 Opus. We’ve made both available in Sudowrite. The team has done limited testing—the models remain in the Experimental section of the Write & Draft selector—but it seems like there's a lot to be excited about!

🧠 Sharper story logic - Both models tout record-breaking benchmarks on reasoning tests. This should translate to more logical and coherent prose generation that sticks to your Story Bible details.

📖 Manuscript-sized Memory – Both models are capable of reading a full manuscript—or at least, thanks to a large context window, taking full advantage of your chapter continuity settings.

🖋️ Very capable continuations – The team's testing suggests that Sonnet at least is super capable of continuing in your Style—like eerily good. Try it for yourself in Write.

Claude 4 Sonnet and Claude 4 Opus are now available in the Write button, Draft, and Plugins.

And here are a few features and fixes we got out the door this week!

Bulk Delete Characters & Worldbuilding - We’ve added bulk deletion to the Story Bible’s Characters and Worldbuilding sections. Just click on a single Character or Worldbuilding card (specifically the non-text area) to select it. Once it’s purple, hold Shift to select multiple consecutive cards, or hold Command (Mac) or Ctrl (Windows) to select multiple non-consecutive cards. Then just click the three dot ••• menu on any selected card to choose Delete and remove all selected cards at once.

Broken Plugin Fix - Certain plugins weren’t working because their original model was deprecated. We updated the model to a current, working equivalent, and those plugins now work as expected.

Quick Chat Selection - Quick Chat had a bad habit of perusing an entire document rather than focusing on the selected text. We’ve fixed that, and it should now prioritize responding in regards to the selection.

Preserve Paragraph Formatting - Certain Story Bible fields with imported content would lose paragraph breaks upon making edits. We fixed that so that imported formatting is now preserved.

Muse Scene Continuation - We fixed an issue with Muse that was causing it to write one scene at a time (rather than continuing) when used in the Draft tool. It will now write all of your scenes at once as expected.