The billable hour has dominated legal pricing for generations—but in an age of squeezed budgets, smarter technology and rising demands for transparency, is selling time still fair? As fixed fees promise greater certainty for clients and stronger incentives for efficient law firms, the profession faces a provocative question: should legal value be measured by how long the work takes, or by what the lawyer actually achieves?

Artificial intelligence promises to make legal services faster, more affordable and more accessible. Yet recent UK cases involving fabricated authorities reveal the danger of treating persuasive AI-generated answers as reliable legal research. This article considers both sides of the debate and argues that AI has a valuable place in law—but only when lawyers retain responsibility, verify every material output and exercise the professional judgment on which justice and public trust depend.