Harvey Unveils Tenet Model for Long-Horizon Legal AI Work
Legal AI company Harvey is moving beyond application software with Harvey Tenet, its first post-trained research model. Built on Kimi K3, Tenet is designed for long-horizon legal agent work that requires planning, reasoning and execution across multiple steps. The effort reflects Harvey’s push to develop frontier, open-weight intelligence tailored to legal professionals rather than relying solely on general-purpose foundation models.
Harvey developed Tenet with Fireworks, using asynchronous reinforcement learning to improve the Kimi K3 base model’s performance on extended legal workflows. The company said Tenet significantly outperformed the underlying model on the Legal Agent Benchmark, or LAB, as well as contract-focused evaluations. The information provided did not specify a release date, disclose full benchmark scores or set a timetable for making the model weights available.
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The history behind this eventHarvey Raises $200 Million to Expand Legal AI Agents
Founded in 2022, Harvey sells generative AI software to law firms and corporate legal departments, targeting work including contract analysis, due diligence, compliance and litigation. Its push into custom AI agents marks a shift from tools that mainly assist with research and drafting toward systems designed to execute multistep legal workflows. The expansion matters because legal services combine large enterprise budgets with strict demands for accuracy, confidentiality and oversight, making the sector a closely watched test of AI commercialization.
Harvey said on March 25, 2026, it raised $200 million in a round co-led by GIC and Sequoia Capital, taking total funding above $1 billion and its valuation to $11 billion. The company said more than 25,000 custom agents were running on its platform for over 1,300 customers. It plans to use the proceeds to broaden agent deployments and expand its legal engineering teams globally. A subsequent report said annualized revenue had topped $350 million as Harvey sought a valuation of $15.5 billion.
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