Top-tier law firms have moved on from 'should we adopt AI'. The leading firms are now restructuring practice groups around it. Most of the second tier has not noticed.
AI in top-tier law is producing a leverage shift large enough to redraw competitive positions across the market — and the next twenty-four months will decide who benefits.
The Real Productivity Story
The headline 'AI saves lawyers time' framing is misleading. The interesting story is structural: in practice areas where AI does the work that previously justified mid-level associate hours, the firm has a choice. It can shrink the leverage pyramid (fewer associates per partner), grow throughput at the same headcount, or move into adjacent advisory work that previously was uneconomic.
Each choice has different commercial and partnership implications. Leading firms are increasingly choosing the third option — moving into work that was previously hard to staff economically — which is a strategic move dressed up as a productivity story.
Where the Leverage Shift Is Most Visible
Three practice areas are furthest along: M&A diligence, where AI now handles a substantial share of document review with senior oversight; finance documentation, where templated structures and clause libraries combine with AI drafting; and regulatory analysis, where AI synthesis of regulatory updates has compressed associate hours dramatically.
Litigation is moving more slowly — partly because the stakes per error are higher, partly because the work is less templated. Disputes practices that are AI-ahead are typically using it for document strategy and witness preparation rather than core argument generation.
What This Means for Firms Below the Magic Circle
Firms in the second and third tier face a choice they may not realise they are making. Match the leverage shift, find a strategic niche that benefits from it, or quietly lose work in three to five years as clients consolidate around firms with the operating model to deliver more for less.
The strategic response is not buying more AI tools. It is rebuilding the practice-group operating model — staffing, partnership structure, pricing — around the new leverage maths. That is a partnership decision, not a technology decision, and it has to come from the top.
What to do next
- Map your top three practice areas against AI-driven leverage change
- Decide explicitly which lever you are pulling: shrink, grow, or expand scope
- Engage the partnership in the operating-model conversation now, not after the next strategy review
- Benchmark against firms two tiers above you on operating model, not pitch deck
Grant & Graham works with law firm managing partners, COOs, and practice group heads. If your organisation is dealing with an AI agenda that has not yet translated into operating-model change, we can help. Our operating-model redesign, AI strategy, and practice group transformation in legal services are deployed in days, not months. Get in touch or email andrew@grant-graham.co.uk.
