Shanghai AI Lab has published Atria Dawn as an open-weight release, with hosted access and local deployment both supported. The Atria Dawn access page shows OpenAI-compatible and Anthropic-compatible API options for the model.
On the Hugging Face model card, the full release is listed with a 512K context window, while preview variants are capped at 256K. The same card says Atria Dawn is built on a 744B-parameter MoE GLM-5.2 foundation model, and that the code and model weights are available under the MIT License.
For builders, that means a long-context, permissively licensed agent model that can sit behind familiar API patterns instead of a single vendor stack. The practical limit is deployment cost: a model at this size is not a lightweight self-hosting option, and the release is text-only, with image inputs explicitly rejected.