The pace of adoption is accelerating sharply. As of end-2024, 78% of U.S. law firms still used no AI tools, but that baseline is shifting rapidly. Thomson Reuters data shows legal organizations actively integrating generative AI rose from 14% in 2024 to 26% in 2025, with 45% of firms either deploying AI or planning to make it central to operations within a year. Corporate legal executives are driving the change: 80% expect outside counsel bills to drop due to AI efficiency gains, though only 9% of law firm leaders report hearing this expectation directly from clients.
Attorneys should monitor two developments. First, firms will likely accelerate AI deployment despite unresolved reliability concerns, creating potential liability exposure for hallucinations and errors. Second, the cost-reduction expectation creates pressure on billing models and staffing. In-house counsel should clarify AI usage policies with outside counsel now rather than discovering surprises in discovery or filings. For firm leaders, the competitive window for AI integration is narrowing—lagging adoption now risks client attrition within 12 to 18 months.