Astra for Law combines GPT-6 Astra with a legal-search index of US cases, statutes, regulations, court rules and administrative decisions, updated daily. It is beginning with selected US firms through Trusted Access, ChatGPT and Codex; API access is promised later. The product page explicitly tells lawyers to review its answers and citations. OpenAI’s product details
The distribution choice is more interesting than another legal benchmark. OpenAI is offering the model directly to firms while allowing legal-software companies, including Harvey and Legora, to build on it; partner integrations reach matter files, prior deals, e-discovery and practice-management systems. Pilot firms include Sullivan & Cromwell, Ropes & Gray, Cooley, Latham and Wachtell. Reuters, September 17
That leaves a defensible layer for specialist vendors and firms: proprietary precedent, permissions, workflow design, audit trails and the habit of knowing when an answer should not leave the building. A daily legal index narrows the raw-information advantage; it does not solve the institutional problem of applying the right house judgment to the right client.