OpenAI introduced Astra for Law, which combines GPT-6 Astra with a legal search index covering more than 230 million URLs of U.S. law and instructions for legal analysis and writing. API customers including Harvey and Legora can build on it, and 26 new plugins connect to tools such as Relativity and Clio.
For builders, the gain comes from retrieval: on 200 Vals AI Legal Research Bench questions, Astra for Law passed 54.0% versus 38.7% for GPT-6 Astra with web search. The source does not establish accuracy outside U.S. law or on independently run evaluations.