The Big Four accounting firms are starting to use AI to reinvent themselves.

PwC and Anthropic announce an expanded strategic alliance, deploying Claude AI across hundreds of thousands of employees worldwide, co-building centers of excellence, and training 30,000 professionals. The collaboration focuses on agent technology, AI-native trading execution, and reshaping enterprise functions, and PwC has set up a Claude Financial Business Group. Practical applications show that Claude can shorten delivery times to 70% of the original in areas such as insurance underwriting and cybersecurity—for example, reducing underwriting cycles from 10 weeks to 10 days.