OpenAI has launched Astra for Law, a GPT-6 Astra configuration for selected U.S. law firms that combines legal retrieval, legal instructions, integrations and governance controls. The launch matters because OpenAI is selling a legal-intelligence layer rather than only a general model, while leaving source validation and professional responsibility with lawyers.\n\n### Key facts\n\n- OpenAI says its U.S. Legal Search Index spans more than 230 million URLs.\n- It reports 54.0% correctness versus 38.7% for web-search Astra on 200 private questions.\n- Initial access is limited to selected U.S. firms through Trusted Access.\n- Primary source: OpenAI's announcement.\n\nOpenAI describes Astra as a configuration, not a separately disclosed legal base model. The index covers U.S. case law, statutes, regulations, court rules and administrative decisions. The company says its Free Law Project partnership covers more than 99.9% of published U.S. precedential case law; CourtListener's coverage page provides useful context. That does not establish every filing, unpublished opinion, foreign jurisdiction or licensed secondary source.\n\nThe headline benchmark is retrieval-plus-answer quality, not a hallucination measurement. OpenAI says Astra found 24% more reference cases and up to 54% more relevant passages. A curated corpus clearly can improve on generic web search. But the private set, missing error analysis and absence of citation precision/recall mean 54% cannot be read as a safe accuracy or failure rate. Its Help Center says users should review answers and cited sources. Harvey's Niko Grupen says it is “citing with precision,” a partner view rather than an audit.\n\nThe commercial move is vertical integration. OpenAI names Harvey, Legora and Thomson Reuters as customers or partners while offering model, retrieval, plugins and governance. Lexis+ with Protégé advertises linked citations and Shepard's treatment signals, illustrating where incumbents defend value. The strongest counterargument is that verification stays the bottleneck, particularly for reversed or procedurally irrelevant authorities. That is right. Astra may be valuable supervised research and assembly, but it is not an autonomous lawyer. The next test is citation-level disclosure and whether review time, not merely retrieval count, actually falls.
Originally published on Ground Truth, where every claim is checked against the primary source.
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