Astra for Law is an AI foundation platform built on the GPT-6 Astra model, designed for law firms and legal technology companies to build custom AI products and workflows for legal research, analysis, and drafting.

Key features and functions include:

Legal Search Index
Provides a legal search index covering U.S. case law, statutes, regulations, and court rules, drawing on a corpus of more than 230 million URLs, with sources added daily. Through a partnership with Free Law Project, the index accesses more than 99.9% of published U.S. precedential case law.

Legal Research & Analysis
Applies legal research to a matter's specific facts, develops arguments or deal terms, and identifies weaknesses and areas of uncertainty in an analysis. In testing on 200 U.S. legal research questions, the platform achieved 54.0% correctness, compared to 38.7% for the underlying model with web search alone, and returned 24% more reference cases on case-law-focused questions.

Custom Application Building
Allows firms and legal technology vendors to build custom applications around their own proprietary data, precedents, and methodologies, with examples including agreement analyzers, deal diligence systems, and IPO preparation tools.

Governance & Security Controls
Offers zero data retention on its API and exclusion of usage from human review by default for eligible firms, along with information permissions, ethical walls, client instructions, and firm oversight.

Partner Plugins & Integrations
Launched with plugins from legal technology partners including iManage, Intapp, DeepJudge, and Thomson Reuters (HighQ and CoCounsel Legal), along with community-built plugins and custom skills. ChatGPT for Word is also available for drafting support.

Access
Available through a Trusted Access Program in ChatGPT and Codex for selected law firms and legal technology companies, including Am Law 200 firms, with API access to follow.