Hemmingway-1

Writing models tend to be judged on reasoning puzzles. Hemmingway-1 is aimed at the plainer work of emails, text messages, replies, letters and short stories, and it is released with open weights.

The model and where it comes from

Hemmingway-1 is a 27-billion-parameter fine-tune of Alibaba's Qwen3.8-27B. Its context window is 262,144 tokens, and a reply, reasoning included, can run to 32,768 tokens; reasoning is switched on unless turned off. The model can read images, supports function calling in the OpenAI style and is English-first. Altworld publishes the weights on Hugging Face. The product is marketed as Hemmingway, and its terms name the Commons Lab, a small group working from Switzerland and South Africa, as maker and operator. The developer gives no release date; the weights repository dates from 20 September 2026, and quantised copies from other parties turned up that day.

Licence changes to read carefully

The weights were first published under Apache 2.0. On 22 September 2026 the repository's licence moved to CC BY-NC 4.0, and commercial use now depends on an agreement with the developer. Companies planning commercial use need that agreement first, and anyone holding an earlier download should confirm the licence it was published under.

Access and claims

A hosted API compatible with OpenAI's format serves the model as hemmingway-27b and allows eight requests at once per account. Consumer apps exist for Mac, Windows, Android and the web. Neither the desktop apps nor the Android app carry Apple or Microsoft signatures or a Play Store listing, which means installing them involves overriding security warnings.

The developer's main results come from three benchmarks of its own making, and it says so openly. It also claims third place on the public EQ-Bench 4, but the model was absent from that leaderboard's public data when last checked. The developer warns that it can be confidently wrong and should not guide medical, legal or financial decisions.

Hemmingway-1 is a 27B model with open weights, fine-tuned for everyday writing such as emails, messages, letters and short stories. Its base model is Alibaba's Qwen3.8-27B. The weights are published under the Altworld organisation on Hugging Face, while the site's terms name the Commons Lab, a small lab in Switzerland and South Africa.

Main features

• Writing help: drafts replies and text messages, writes letters, and produces short stories.
• Long context: a 262,144-token context, with replies of up to 32,768 tokens including reasoning, which is on by default.
• Images and functions: reads images and supports OpenAI-style function calling.
• Hosted API: an OpenAI-compatible endpoint with up to eight concurrent requests per account.

Who it serves

People who want help with everyday writing, and developers building writing features, subject to the licence terms.

Key facts

• Language: English first.
• Licence: first published under Apache 2.0, then switched to CC BY-NC 4.0, so commercial use needs an agreement with the developer.
• Apps: the desktop and Android apps lack Apple or Microsoft signatures and are not on the Play Store.
• Benchmarks: the developer's results come from three benchmarks it built itself.
• Repository date: the Hugging Face repository was created on 20 September 2026.