The short version
OpenAI is making its first major, named push into the legal industry. Astra for Law pairs GPT-6 Astra with settings, tools, and context tailored for professional legal work, and is initially offered to selected firms through a "Trusted Access" program, with API access coming soon[1]. The centerpiece is a legal search index covering U.S. case law, statutes, regulations, court rules, and administrative decisions across more than 230 million URLs[1].
What Astra for Law is
It's important to be precise: OpenAI describes Astra for Law as a configuration, not a new model. It combines GPT-6 Astra — "our latest and most powerful model" — with custom instructions for legal analysis and writing, and a dedicated legal search index[1]. In ChatGPT it appears in the model picker as GPT‑6 Astra Law, and in the API as gpt-6-astra-law[1].
The legal search index
The flagship feature is a legal research tool that searches U.S. case law, statutes, regulations, court rules, and administrative decisions across a corpus of more than 230 million URLs, with sources added daily[1]. OpenAI built it with the Free Law Project, the nonprofit behind CourtListener, whose case-law collection covers more than 99.9% of published U.S. precedential case law[1].
How it performs
OpenAI tested Astra for Law on 200 U.S. legal research questions from the private validation set of Vals AI's Legal Research Bench. At the highest reasoning effort for both systems, Astra for Law passed the overall correctness check on 54.0% of questions versus 38.7% for GPT-6 Astra using web search alone — a 40% relative improvement[1].
| Metric | Astra for Law | vs GPT-6 Astra (web search) |
|---|---|---|
| Vals AI correctness | 54.0% | 38.7% — a 40% relative gain[1] |
| Reference cases found | +24% | More reference cases on case-law questions[1] |
| Relevant passages | +54% | More relevant passages from correct opinions[1] |
Trust and controls
Legal work demands confidentiality, and this is where OpenAI is competing hardest on trust. The Trusted Access Program for eligible law firms includes Zero Data Retention (ZDR) on the API and excludes ChatGPT Enterprise usage from human review by default[1]. OpenAI is also working with Latham & Watkins on information permissions, ethical walls, client instructions, and firm oversight[1].
Plugins and integrations
Alongside the model, OpenAI launched 26 partner-built plugins connecting ChatGPT to specialist legal tools. Examples: iManage lets a lawyer draft a negotiation brief and save it to the matter file; Intapp surfaces activities that may need a time entry; DeepJudge brings prior deals into a comparison; and Thomson Reuters is bringing HighQ matter context into ChatGPT[1].
Availability
Astra for Law is initially offered to selected law firms through Trusted Access in ChatGPT and Codex, and is "coming soon" to the API — with API customers including Harvey and Legora announced as early builders[1]. OpenAI has not published consumer pricing; access is gated through the firm program and API.
What it means for small firms and solo lawyers
- Research gets a head start. A built-in, current legal index means less time spent assembling authorities before analysis begins[1].
- Confidentiality is the real product. ZDR and no-human-review defaults are aimed squarely at the compliance concerns that keep firms off general-purpose AI[1].
- Not for everyone yet. Initial access is selective — most solo and small firms will wait for broader API or ChatGPT availability[1].
Bottom line
Verdict: A credible, well-sourced first step into legal AI — but early. The value for most professionals today is directional: it signals that legal-specific AI with real privacy controls is arriving, and that GPT-6 Astra's capabilities are being productized for regulated industries.
Frequently asked questions
Is Astra for Law a new model?
No. OpenAI describes it as a configuration of GPT-6 Astra with legal settings, tools, and context — not a separately trained model[1].
Can any lawyer sign up today?
Not yet. It's initially offered to selected law firms through the Trusted Access Program in ChatGPT and Codex, with API access coming soon[1].
What's in the legal search index?
U.S. case law, statutes, regulations, court rules, and administrative decisions across more than 230 million URLs, sourced with the Free Law Project's CourtListener[1].
Sources
- OpenAI — "Introducing Astra for Law" — openai.com
- LawNext (Bob Ambrogi) — "OpenAI Releases Astra for Law, A GPT-6 Model Tailored for Legal Work" — lawnext.com