LLMs are on the verge of replacing data scientists and investment bankers. But can they perform simple accounting tasks for a real business? We built Accountin

LLMs are on the verge of replacing data scientists and investment bankers. But can they perform simple accounting tasks for a real business? We built AccountingBench, a test where LLMs must "close the books" for a real SaaS business using 1 year of Stripe/Ramp/Rippling/Mercury data. Claude 4 and Grok 4 start strong - within 1% of human CPA baselines in month 1. But as time progresses, all models inevitably accumulate compounding errors and exhibit erratic behavior, causing significant deviations. That said, the early accuracy here is promising. With targeted post-training, models may be able to replace humans for this kind of work.