Earlier today Anthropic launched their most powerful model yet: Claude 4.1 Opus. We just added it to Sudowrite.

We haven’t had much time to test this new model, but it matches the 200K context window of Claude 4.0 Opus. That means you can get the most out of Chapter Continuity, or use it to build Plugins that can read entire manuscripts.

Anthropic also reports that 4.1 Opus has better reasoning, which should translate to better adherence to the specifics of your Story Bible. It also showed Anthropic’s best benchmarks yet when it comes to multilingual support.

Claude 4.1 Opus is now available in Write, Draft, and Plugins. Try it out, and let us know what you think of the actual prose. (We hear it may be good for banter!)