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Qwen’s Former Lead on What Hybrid Thinking Got Wrong — and Why He Now Backs Agents

Junyang Lin, former Qwen technical lead, critiques hybrid thinking in Qwen3 and advocates for agentic thinking. He explains the difficulties in merging thinking and non-thinking modes, and why agentic RL requires decoupled infrastructure and high-quality environments to avoid reward hacking.

SourceMarkTechPostAuthor: Michal Sutter
Qwen’s Former Lead on What Hybrid Thinking Got Wrong — and Why He Now Backs Agents
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Under the source content permission, this page provides an editorial summary, key points, and a link to the original article.

Key points and analysis

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Key points

  • Junyang Lin stepped down as Qwen lead on March 3, 2026, now writes as independent researcher.
  • Qwen3's hybrid thinking mode was challenging to implement; later variants re-separated Instruct and Thinking.
  • Lin sees agentic thinking as the next era, judged by sustained action rather than internal deliberation.
  • Agentic RL infrastructure must decouple training and inference, with reward hacking as the central risk.

Highlights and analysis are generated automatically and may contain errors. Check the original source.

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