Allen & Overy deploys Harvey firmwide — first major law firm to roll out GPT-based generative AI

Scale: Firmwide; 3,500+ lawyers across 43 offices (financial terms undisclosed)
Vendors: Harvey AI
Significance: High
Confidence: Confirmed

Why this matters

Allen & Overy has moved past pilots into deployment, with Harvey AI in the stack. This is a high-significance signal for buyers benchmarking their panel.

Allen & Overy became the first major law firm to deploy generative AI firmwide, rolling out Harvey to 3,500+ lawyers across 43 offices after a beta trial (begun November 2022) in which lawyers ran roughly 40,000 queries. Led by A&O's Markets Innovation Group (David Wakeling). Used for contract analysis, due diligence, research, and regulatory compliance, with mandatory lawyer review of outputs.

""This announcement marks a new era for A&O and the legal industry. Harvey AI is not just another platform, but a game-changer that will enable us to deliver unprecedented value, efficiency and innovation to our clients." — Wim Dejonghe, Senior Partner, Allen & Overy"

Scale / Terms: Firmwide; 3,500+ lawyers across 43 offices (financial terms undisclosed)
Significance: High
Source type: Firm Press Release

Vendors involved

Harvey AI

Products

Harvey · Harvey AI

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