Definition
Astra for Law is openai’s vertical legal-work configuration of gpt-6-astra, launched September 17, 2026. It combines the base model with a legal-search-index, legal analysis instructions, and 26 legal plugins — targeting U.S. law firms and legal-tech vendors.
Key Features
- Legal Search Index: 230M+ URLs covering U.S. case law, statutes, regulations, court rules, administrative decisions; sources added daily
- Corpus: courtlistener / Free Law Project covers 99.9%+ of published U.S. precedential case law
- Benchmark: 54.0% correctness on Vals AI Legal Research Bench vs 38.7% for GPT-6 Astra + web search (highest reasoning effort, vendor-reported)
- Partners: harvey, legora as API partners; Sullivan & Cromwell, Ropes & Gray, Cooley as early adopters
- Privacy: Trusted Access Program with ZDR; Enterprise usage excluded from human review by default
- Access: Selected firms via ChatGPT/Codex Trusted Access; API
gpt-6-astra-lawcoming soon
Vertical AI Pattern
Illustrates shift from general-purpose LLMs to domain-specific RAG + agent configurations with proprietary indexes — instructive for developers building vertical agents.