Modellix Adds 28+ Models, Including $0 Options, to DeepSeek Harness Beta

Aurora Mobile’s Modellix has released dsh-modellix, a beta plugin that brings its LLM gateway into DeepSeek Harness’s native model selector. The immediate draw is access to more than 28 models through one API key, including two models billed at $0 per call, for a coding agent that Aurora Mobile says reached nearly 200,000 GitHub stars shortly after its open-source debut.

A gateway inside the agent

DeepSeek Harness was open-sourced on August 13. Aurora Mobile said it had accumulated nearly 200,000 GitHub stars by August 27, a rapid uptake that gives third-party plugins a potentially large distribution point. Harness is built around plugins, and dsh-modellix uses that structure to place Modellix’s catalog directly in the agent’s model picker.

The plugin’s LLM, Design and Web functions can be toggled independently. Its working LLM layer synchronizes Modellix’s live catalog, spanning providers including OpenAI, Anthropic, Google, xAI, GLM, Qwen, DeepSeek and Kimi. That means a developer can change among models without changing the API key used by the agent.

The zero-cost offer has an entry condition

The two $0-billed choices are modellix-ai/free-llm, which Aurora Mobile says automatically routes requests to current open-source LLMs, and zai/glm-4.7-flash. The first is a routing label rather than a fixed model named in the release; developers wanting a particular model can select from the larger catalog, where pricing varies.

The offer is not a sign-up-free path. Users need a Modellix account and API key, and Aurora Mobile says account balance must be topped up before an API key can be created. The company nevertheless states that calls to the two named models are billed at $0, separating per-call pricing from the account-setup requirement.

One integration, uneven maturity

The model side supports OpenAI-compatible Chat Completions and Responses APIs, plus Anthropic-compatible Messages APIs. Modellix also says compatible clients can redirect requests to its gateway with a base-URL override instead of a code rewrite. For teams already using those API styles, the plugin is one route to consolidate model access inside Harness.

The broader feature set is not equally ready. Web mode routes Harness’s web_search and web_fetch tools through a Modellix endpoint. The LLM capability is functional in this beta, but Design—intended for image, video and audio generation—remains in preview while Modellix works across upstream model schemas. Aurora Mobile also says the beta’s APIs and behavior may change before a full release.

dsh plugin --profile web add dsh-modellix

That leaves the practical test for users: whether the gateway’s catalog, web routing and model compatibility are dependable enough for daily coding work as the plugin evolves. For now, dsh-modellix is a beta access layer, not a finished multimodal workspace.