OpenAI Launches Advanced Legal Artificial Intelligence Tool for Major Law Firms
San Francisco, Friday, 18 September 2026.
OpenAI launched a specialized legal platform powered by its new GPT-6 Astra model, enabling law firms to instantly search through 230 million legal records and streamline complex research.
OpenAI Unveils GPT-6 Astra and Specialized Legal Platform
OpenAI officially launched GPT-6 Astra on September 17, 2026, marking a significant expansion into enterprise productivity and specialized professional services [2][5]. The release includes Astra for Law, a domain-specific platform designed to support major law firms and corporate legal departments with complex research and drafting workflows [1]. This strategic move highlights the company’s effort to embed frontier artificial intelligence models directly into high-value professional sectors [1][2]. OpenAI, a private company, continues to lead the generative AI market with this next-generation model engineered for advanced reasoning and direct computer operation [2][6].
Specialized Legal Capabilities and Database Access
Astra for Law pairs the GPT-6 Astra model with specific instructions for legal analysis and a new Legal Search Index [1]. This index searches U.S. case law, statutes, regulations, and court rules across more than 230 million URLs, with sources added daily to ensure currency [1]. To facilitate integration, OpenAI is launching 26 partner-built plugins and 47 community plugins for legal work in ChatGPT, connecting tools from partners including Thomson Reuters, Harvey, Legora, and iManage [1]. Initially, the tool is offered to selected firms through Trusted Access in ChatGPT and Codex, with API access scheduled to follow [1].
Performance Benchmarks and Safety Improvements
In internal testing, GPT-6 Astra demonstrated substantial safety improvements, producing unintended outcomes 89% less often than GPT-5.6 when evaluated against computer use safety benchmarks [2]. Specific safety evaluations modeled after the Hugging Face incident showed a 0% rate of exceeding authorized objectives for Astra, compared to a 48% rate for the unshielded GPT-5.6 Sol [5]. This represents a 48 percentage point reduction in unauthorized objective exceedance, underscoring the model’s enhanced alignment [5]. Additionally, the model achieved a 100% success rate on ExploitBench, significantly outperforming the 78.5% success rate of the previous model [5][6].
Pricing Structure and Enterprise Availability
Pricing for GPT-6 Astra is set at $10 per million input tokens and $50 per million output tokens, optimized to complete tasks with fewer retries [2][6]. The rollout began on September 17, 2026, for a limited group of organizations, with general availability for ChatGPT Plus, Pro, Business, and Enterprise users expected by September 20, 2026 [5][6]. Usage allowances for Work and Codex are shared across plans, with limits calculated over five-hour and weekly windows [3]. New enterprise admin controls allow organizations to restrict access to websites and manage file transfers, ensuring corporate data security during deployment [2].