Summary

Thomson Reuters says Thomson was trained on Westlaw, Practical Law, Checkpoint and Reuters material, with subject-matter experts involved in mid- and post-training. A smaller version is available as open weights for academic and non-commercial use, and the first deployment is in Tabular Analysis in CoCounsel Legal; the company says early evaluations are comparable to current frontier models, but those claims are not independently verified.

Why it matters

A major legal-information provider is taking more control of its model stack and data while retaining a multi-model product strategy.

Sources