ByteDance is preparing to release a standalone personal AI agent tied to Doubao, moving the assistant from a phone-embedded tool toward a cross-device app that can act on behalf of users. The product has been in internal testing since April under the codename Spell and is tentatively named Xiaodou (小豆), according to multiple Chinese media reports1,2,3.
ByteDance has not officially announced the product, its final name, or a launch date. The app remains in internal testing, and its public name and features may change before launch.
From phone assistant to standalone agent
Spell was initially led by the team behind the Doubao phone assistant. That phone assistant first appeared as a technical preview in December 2025 on a Nubia engineering device made with ZTE, and a consumer version launched in mid-September on the Nubia NaviX Ultra, handling cross-app tasks such as tracking deliveries and ordering food.
Reports describe Spell as a step from a system-level assistant tied to specific handsets toward an app that could run on any phone. Doubao now plans to integrate Spell more deeply with its main product, with the Spell project team and the Doubao chat team jointly responsible for a new product expected to reach users relatively soon.
Sina Tech reported on September 29 that Doubao began internal testing of the exploratory personal-assistant product in April under the Spell codename, and National Business Daily published a similar account the same day. A separate, unverified social media post claimed Doubao teams were asked over the Mid-Autumn Festival holiday to produce an internal trial version by September 30; some industry commentators questioned whether that timeline was realistic.
The core idea behind Spell is to move AI beyond answering questions and toward completing tasks on behalf of users, an approach increasingly described as a personal agent.
Broader product push
The standalone agent would extend a rapid sequence of Doubao product launches. On August 25, ByteDance launched Doubao Work, an agent product designed for enterprise and office scenarios that can handle tasks ranging from drafting documents and organizing meeting notes to processing data across different software tools. Doubao has also added editing of local Office files, task handoffs across up to five devices, and the ability to create customized skills through screen recordings.
The effort lands amid a crowded field. OpenAI shipped Dots on September 29, a persistent agent system powered by GPT-6 Astra that connects to more than 4,000 apps[1]. Meta's MUSE agent has drawn attention alongside security and permissions disputes[2]. In China, Alibaba Group Holding's Qwen said at the Alibaba Cloud Apsara Conference on September 22 that it would accelerate work on a personal agent, and Tencent is reportedly testing a personal agent called Handy Bot through a WeChat service account.
ANALYSIS ByteDance's move from a hardware-locked phone assistant to a standalone app lowers the distribution barrier: rather than requiring a specific Nubia handset, a cross-device app could reach Doubao's existing user base directly. The parallel formation of a joint team merging the Spell and Doubao chat groups suggests ByteDance is treating the personal agent not as a side experiment but as a core extension of Doubao itself.