{"rewrite":{"id":"r_756ef38b0a8f03f372e0f996","clusterId":"c_df2e01e98ea5ecdc9fa73cd1","slug":"openai-launches-astra-for-law-a-gpt-6-astra-tuned-for-legal-work","model":"deepseek-v4-1-flash","headline":"OpenAI Launches Astra for Law, a GPT-6 Astra Tuned for Legal Work","summary":"OpenAI announced Astra for Law, a version of its frontier model GPT-6 Astra fine-tuned for legal tasks and paired with specialized settings, tools, and context. It includes built-in prompts for legal analysis and document drafting, administrative features for confidential client work, and a legal search index covering more than 99.9% of U.S. case law. It goes first to selected law firms through Trusted Access for ChatGPT and Codex, with API support planned soon.","whyItMatters":"OpenAI is opening a second front in professional AI with a tuned model, a case-law index, and a pilot that runs through law firms rather than the general ChatGPT audience.","webCardHtml":"\u003cp\u003eThe legal search index behind Astra for Law holds data from more than 230 million URLs, according to OpenAI, and the company says sources are added daily. Users can search case law, statutes, regulations, court rules, and administrative decisions.\u003c/p\u003e\u003cp\u003ePlugins connect ChatGPT to tools law firms already use, including Relativity and Clio, so firms can customize the model around existing workflows. On benchmarks measuring legal capabilities, Astra for Law scored higher than GPT-6 Astra with web search on Weighted rubric score and All-pass rate.\u003c/p\u003e\u003cp\u003eOpenAI framed the release as a long-term investment in the legal field, with continued updates based on evaluation and feedback from lawyers and legal technology partners.\u003c/p\u003e","blueskyPost":"OpenAI is routing Astra for Law through Trusted Access for ChatGPT and Codex before the API opens, so firms that want the fine-tuned model have to accept OpenAI's access gate first.","twitterPost":"Astra for Law reaches law firms through Trusted Access first, which means OpenAI's access gate, not the API, decides who adopts it.","threadsPost":"Astra for Law arrives with a legal search index covering more than 99.9% of U.S. case law, and that index is the asset law firms can't replicate on their own. The model matters less than the corpus underneath it.","newsletterBlurb":"OpenAI announced Astra for Law, a fine-tuned version of GPT-6 Astra built for legal work. It carries built-in prompts for analysis and drafting, administrative features for confidential client work, and a legal search index covering more than 99.9% of U.S. case law. Selected law firms get access through Trusted Access for ChatGPT and Codex first, with API support planned soon.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20260918-openai-astra-for-law/\",\"title\":\"Legal AI \\\"Astra for Law\\\" Launches, Much Better at Legal Tasks Than GPT-6 Astra\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4602,"outputTokens":633,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1789702169,"createdAt":"2026-09-18T03:25:07.000Z","publishedAt":"2026-09-18T03:28:26.000Z","updatedAt":"2026-09-18T03:28:26.000Z"},"cluster":{"id":"c_df2e01e98ea5ecdc9fa73cd1","canonicalTitle":"法務向けAI「Astra for Law」が登場、GPT-6 Astraより法務タスクがとても上手","representativeArticleId":"a_5a4e364695d4dbf0a0f3ff97","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"announcement\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-09-18T02:34:00.000Z","lastSeenAt":"2026-09-18T02:34:00.000Z","updatedAt":"2026-09-18T03:28:21.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20260918-openai-astra-for-law/","title":"法務向けAI「Astra for Law」が登場、GPT-6 Astraより法務タスクがとても上手"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"announcement","domain":"other","is_roundup":false},"keyFacts":null}