Definition
Legal AI encompasses AI systems performing legal research, document review, compliance analysis, and increasingly full legal service delivery under attorney supervision. Distinct from generic document automation — includes licensed practice models.
Key Points
- 2026-09-17: openai launched astra-for-law — GPT-6 Astra + legal-search-index (230M+ URLs); 54.0% vs 38.7% on Vals AI Legal Research Bench; partners harvey, legora
- Vertical AI pattern: domain index + frontier model configuration > general web search for legal RAG
- 2026-07: norm-ai unicorn ($1.2B) validates AI-native law firm model with outcome-based-billing
- Pattern: AI agents execute tasks + human attorneys supervise + institutional trust layer
- High-stakes regulated environments (finance, healthcare) demand auditable agent governance
- Challenges traditional billable-hour economic model