# OpenAI-backed legal tech firm pivots to Chinese Kimi K3 open-weight model > Source: > Published: 2026-08-21 14:00:10+00:00 # OpenAI-backed legal tech firm pivots to Chinese Kimi K3 open-weight model San Francisco-based Harvey says its new model, Harvey Tenet, was post-trained on top of the open-weight Kimi K3 base [Moonshot AI’s Kimi K3,](https://www.scmp.com/tech/article/3362143/moonshots-kimi-k3-triggers-silicon-valley-debate-over-bans-chinese-open-source-models?module=inline&pgtype=article)highlighting a growing shift by Western tech firms towards Chinese open-weight systems amid soaring development costs. San Francisco-based legal tech provider Harvey, whose high-profile backers also include Sequoia Capital and Andreessen Horowitz, said on Thursday that its new model, Harvey Tenet, was post-trained on top of the open-weight Kimi K3 base. The company said the system achieved “state-of-the-art” performance in complex legal work. [OpenAI](https://www.scmp.com/topics/openai?module=inline&pgtype=article)and Google for legal applications. Harvey’s pivot was “a great example of open-weight models” enabling developers to post-train systems on specific industry or corporate data for higher accuracy and lower inference costs, AI policy researcher Simon Hedlin wrote on X on Friday. Post-training is the process of refining a general-purpose base model with specialised data sets to excel at specific tasks.