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OpenAI Pushes GPT-6 Astra Into Legal Work With Harvey and Astra for Law

September 24, 2026 at 13:36 EDT

Foundation Models
AI Agents
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OpenAI is extending GPT-6 Astra into legal workflows, positioning the model as a foundation for research, analysis and drafting systems used by law firms and legal technology vendors including Harvey. The move centers on Astra for Law, a legal configuration of GPT-6 Astra that combines the frontier model with a dedicated legal search index, legal-writing instructions and enterprise controls.

September 17, 2026 · OpenAI

GPT-6 Astra Enters Legal Work

Astra for Law combines GPT-6 Astra with legal search, legal-writing instructions and firm controls so platforms such as Harvey can build research and drafting workflows around it.

Legal research benchmark

38.7%

GPT-6 Astra with web search

54.0%

Astra for Law

At the highest reasoning effort, the legal configuration posted a 40% relative improvement on 200 U.S. legal research questions.

230M+

legal URLs in the search corpus

24%

more reference cases found

54%

more relevant passages retrieved

partner-built legal plugins

From facts to draft work

Client facts

Matter-specific facts and questions.

→

Legal search

Authorities, passages and relevance.

→

Analysis

Arguments, objections and risk.

→

Draft

Memos, deal terms and revisions.

What improves

Early testers point to stronger grounding in authorities, precise citation and practical advisory guidance for litigation and transactional work.

What remains

The benchmark is vendor-reported, the pass rate is still 54.0%, and lawyers must review cited authorities before relying on outputs.

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