OpenAI launches Astra for Law, pairing GPT-6 Astra with a 230M-URL legal search index
- OpenAI introduced Astra for Law on September 17, 2026, a configuration of GPT-6 Astra with a legal search index and instructions for legal analysis and writing, sold to law firms and legal technology companies rather than consumers.
- On 200 questions from the private validation set of Vals AI's Legal Research Bench, Astra for Law passed the evaluation's overall correctness check on 54.0% of questions at the highest reasoning effort, against 38.7% for GPT-6 Astra using web search alone, a 40% relative improvement.
- The legal search index covers more than 230 million URLs of U.S. case law, statutes, regulations, court rules, and administrative decisions, with sources added daily, and includes Free Law Project's CourtListener collection covering over 99.9% of published U.S. precedential case law.
- On case-law questions Astra for Law found 24% more reference cases and retrieved up to 54% more relevant passages from the correct court opinions than GPT-6 Astra with web search alone at the same reasoning effort.
- Harvey and Legora can build on Astra for Law through the API, and OpenAI added 26 ecosystem plugins connecting ChatGPT to tools such as Relativity and Clio, plus new privacy and governance controls for confidential client work.
Hacker News opinions
Breaking crypto in the cloud era is about cost, not time, and legal attacks will work the same way. The biggest wallet wins.
That's how the US legal system has always worked. You could always just hire the most lawyers.
If anything this lowers the barrier. Instead of 50 lawyers burning hundreds of hours, one or two lawyers plus Astra decide whether a case is worth taking in the first place.
OpenAI is encroaching on every industry now. Engineers, accountants, 3D animators, therapists, analysts, anyone who works behind a screen is on the list, and they have the brand and user base to do it.
Top talent plus capital is already an insurmountable moat. OpenAI, Anthropic and SpaceX all have it, and regular teams can't compete if they pick your industry.
The future is going to be boring. We all review LLM output and put our signature under it.
No word on hallucinations anywhere in the blog post, which is the number I'd actually want to see.
The benchmark they're pointing at shows GPT-6 Astra has the lowest hallucination rate of all tested models, so that complaint doesn't land.
Does hallucination even matter for this use case? Raw recall is less important when a lawyer checks every citation by hand anyway.
Common law already hallucinates plenty on its own.
Interesting that Harvey and Legora show up as customers inside the post rather than competitors. OpenAI isn't willing to take on those customer relationships yet.
Can I use this to write real terms and contracts for my product, and who gets sued when it's wrong? Me, obviously.
It's a tool, you're the one liable. Don't take legal advice from a word calculator.
This isn't a product they're selling to you or me, it's for lawyers. If you can't take personal liability for a badly written contract, don't use it.
I already use LLMs for terms of use and they're much better than the generator products that used to exist. Nobody bothers suing you until you're big enough to be worth it.
You can solve this without AI at all. Common Paper publishes standard contracts you can just use.
When you shoot someone with a gun, who gets sued, you or the manufacturer? Same answer here.
Courts are about to get flooded with AI-generated lawsuits even worse than they already are.
Why aren't courts fighting fire with fire? The labs get to play arms dealer and sell to both sides.
The legal system is a machine and it's going to get eaten. The cost of making an argument collapses while the cost of an enforceable decision goes up, so justice gets gated even harder.