Spellbook is an AI tool for legal professionals that significantly expedites contract drafting and reviewing by using OpenAI’s GPT-4 and other large language models. It integrates seamlessly with Microsoft Word, offers AI-assisted redlining, suggests contract terms, instantly generates new clauses, detects aggressive terms, lists missing clauses, provides negotiation tips, and has features for auto diligence. Trained on a massive corpus of legal texts, the internet, and general facts, Spellbook is specifically tuned to meet the needs of lawyers and contract professionals, boasting a user base of over 2,000 lawyers with a growing waitlist of over 40,000.