We’ve just added OpenAI’s latest model release, the GPT-4.1 suite, to Sudowrite.

GPT-4.1, GPT-4.1 Mini, and GPT-4.1 Nano are now available—three fresh models with some seriously exciting capabilities. Based on OpenAI's release documentation and some early testing, here’s what you can expect:

• Better instruction following: These models are noticeably better at taking complex instructions and getting it right the first time, even compared to other brainy models like o3-mini. GPT-4.1, in particular, should be capable of following the intricate plot details of your story with more precision and fewer rewrites.

• Increased capacity to read & remember: All three models have a context window of up to 1 million tokens. In practice, that means these models will use the maximum readback available in Sudowrite when writing for you, resulting in better consistency and continuity. It also means you can build Plugins that can read and analyze books longer than Anna Karenina.

• Stellar value: Credit use will always vary depending on what you’re trying to do, but so far GPT-4.1 is being compared favorably to GPT-4 Turbo (Balanced). Meanwhile, the brainy 4.1 Mini is reasonably priced at roughly 2× the cost of 4o Mini—and Nano appears to be impossibly cheap, ~30% cheaper than 4o Mini (Basic).

These models are now available in the Experimental Models section of your Write settings and Draft tool. They're also selectable when building Advanced Plugins. Give them a spin and let us know what you think. We’re curious which you’ll find yourself using, and for what!