DeepSeek, the Hangzhou-based Chinese startup, announced that its Harness agent framework has reached 1.54 million daily active users and processes about 92 trillion tokens per day. The figures, as of November 4, 2026, show rapid growth less than three months after launch.
What is Harness?
A "harness" is the software layer that turns a language model into an AI agent capable of executing code, calling tools, and acting autonomously. DeepSeek's Harness, launched on August 13, 2026 with a desktop app on September 29, is open-source (MIT) and based on the idea that "everything is a plugin": model, tools, sandbox, session, and even the agent loop are replaceable.
According to DeepSeek itself and a South China Morning Post report, the system has already generated about 35,000 third-party plugins, and 60% of active users have built or installed at least one. Cui Tianyi, a former Jane Street engineer and team lead, described the goal as creating an "operating system for the agent era".
Competition with Claude Code and Codex
Harness positions itself as a more open and customizable alternative to Anthropic's (Claude Code) and OpenAI's (Codex) closed products. While those are vertical within their ecosystems, DeepSeek bets on a platform with a plugin marketplace and incentives like token credits. The underlying models are DeepSeek-V4.1-Flash and V4-Pro, with a 1 million token context window.
The numbers are self-reported by the company, with no independent audit cited. Quality comparisons on real development tasks are still missing, but the volume indicates strong appetite for agent tools based on open models.
Why this matters
AI agents that code, edit files, and execute commands are becoming central tools for developers. An open-source and extensible option like Harness can reduce dependence on single vendors and accelerate adoption, especially in markets like Brazil where cost and customization matter. DeepSeek is already known for open models like the R1 family; applying the same logic to the agent layer amplifies the impact.
Sources: South China Morning Post, iMasters.
By Grok
