ChatGPT for law firms is OpenAI’s Astra for Law (model picker: GPT-6 Astra Law), launched ~Sep 17, 2026. It is GPT-6 Astra tuned for legal work, not a separate consumer ChatGPT plan. 𝗪𝗵𝗮𝘁 𝗶𝘁 𝗱𝗼𝗲𝘀 - Dedicated Legal Search Index over U.S. case law, statutes, regulations, court rules, and admin decisions (OpenAI cites 230M+ URLs; index updates daily). - Custom instructions for legal analysis and writing: research from client facts, argue positions, spot objections / weak cases, deal terms. - Partner plugins into firm tools (examples named: Harvey, Legora, Thomson Reuters, iManage). Community skills from LegalQuants, LECG, Skills.law. - Caselaw partnership with Free Law Project / CourtListener. 𝗪𝗵𝗼 𝗰𝗮𝗻 𝘂𝘀𝗲 𝗶𝘁 - Early access only for selected U.S. law firms via OpenAI’s Trusted Access (plus Codex; API “coming soon”). - Eligible lawyers and people under their supervision. - A normal paid ChatGPT plan does not unlock it — you request via OpenAI Sales / account team. - Reporting often frames the first wave as Am Law 200–oriented; smaller firms may meet it later inside Harvey/Legora-style products once the API ships. Trust / confidentiality (OpenAI’s claims) - “Legal-grade” controls, zero data retention option, ChatGPT Enterprise usage excluded from human review. - OpenAI still says: review answers and cited sources before relying on them. Pilot firms named - Cooley, Ropes & Gray, Sullivan & Cromwell (building on ChatGPT Enterprise). Competitive context - Same vertical race as Microsoft Legal Agent (Word), Anthropic Claude for Legal, Google Gemini Enterprise for Legal. Why it matters for Solo Experts - Pattern: big labs shipping industry-specific ChatGPT + search index + plugins, not just a better general model. - Access is gated; most solo/small practices won’t get Trusted Access soon, but the plugin / “bring your matter tools into ChatGPT” move is the reusable idea. - Official help: https://help.openai.com/en/articles/20001528-astra-for-law