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Thomson Reuters launches Thomson-1 AI model built on adapted Alibaba open-source code

The company aims to cut costs and lower its reliance on third-party providers like Anthropic by building its own in-house model for specialized tasks.

Updated Aug 24, 2026 · 13:18 UTC1 reports

The short version

  • Thomson Reuters launched Thomson-1, its first proprietary artificial intelligence model, to handle specialized tasks like document review.
  • The model is based on Snowdon, an adapted version of Alibaba's open-source Qwen architecture developed alongside Imperial College London researchers.
  • Thomson Reuters plans to transition more features of its CoCounsel tool to Thomson-1 over time, though Anthropic's Claude will continue to power primary capabilities for now.
  • The move highlights a growing corporate reliance on low-cost open-source Chinese models, amid security and ethical concerns raised by U.S. lawmakers and competing AI firms.

Key facts

  • Thomson Reuters introduced Thomson-1, an in-house AI model designed to perform domain-specific tasks starting with document review.[Business Insider]
  • Thomson-1 is powered by Snowdon, a model created by realigning Alibaba's open-source Qwen codebase over several months in collaboration with Imperial College London.[Business Insider]
  • Chief technology officer Joel Hron stated that financial savings and the desire to build proprietary intellectual property were primary drivers for developing the model.[Business Insider]
  • Thomson Reuters expanded its alliance with Anthropic in May, and its CoCounsel legal assistant remains predominantly powered by Anthropic's Claude.[Business Insider]
  • U.S. lawmakers, including Sen. Tom Cotton, and competing firms like Anthropic have voiced concerns regarding security risks and intellectual property practices associated with Chinese open-source AI tech.[Business Insider]

What remains uncertain

  • The long-term extent to which Thomson-1 will displace Anthropic's Claude across Thomson Reuters' software ecosystem remains unspecified.[Business Insider]

Sources