Meet Stone: "The Architect" – Building Your Case with Unrivaled Technical Precision

In our ever-expanding tour of the First Drafts AI Panel System, we introduce our latest model engineered for cases where complexity is the central challenge and intellectual rigor is the only answer. While Marshall persuades with eloquence and Ginsburg uncovers strategic depth, some cases demand a different kind of power: the sheer force of unassailable logic and technical mastery. Today, we introduce that power: Stone, "The Architect."

Named for Chief Justice Harlan F. Stone, a renowned legal scholar known for his profound intellect and meticulous reasoning, our Stone AI model is our most intelligent and technically rigorous legal writer. It is engineered to be your specialist for the most demanding tasks, excelling at long-context reasoning, precise application of case facts, and flawless recitation of case law. When the facts are dense and the law is intricate, Stone is the master builder you need to construct an ironclad legal argument.

The Hallucination Index: Stone's Dedication to Factual and Legal Accuracy

At First Drafts, transparency is paramount. First Drafts' Hallucination Index is a meta-study on our own models using First Drafts' proprietary standardized testing benchmark of ten fixed test cases ranging in complexity and tasks to determine the citation capability and accuracy of each model. Across four separate classes of citations, each model is scored based on how many of the citations generated from whole cloth is accurate. Hallucination testing is completed by the company's attorney-consultants with access to legal research databases to check citations; the Hallucination Index is an estimation of likely hallucinations that a user might encounter in any given task, and not a guarantee of the model's performance.

The Hallucination Index for Stone sets a new benchmark for reliability. Designed to be technically rigorous and fact-faithful above all else, Stone demonstrates the lowest rate of citation fabrication across our entire AI Panel. It excels in accurately citing not just high-level precedent but also complex statutory schemes and dense, fact-specific case law from lower courts. This makes it an exceptionally dependable tool for tasks that require navigating a mountain of documents and legal authorities. While no AI eliminates the need for attorney verification, Stone is designed to provide the most accurate and trustworthy foundation possible.

The Architect in Action: Stone's Drafting Prowess and Performance

As "The Architect," Stone is not designed for rhetorical flourish; it is designed for intellectual dominance. Its writing is direct, technical, and unadorned, reflecting its core purpose: to build the most logical, well-supported, and defensible argument from the ground up. Stone's strength lies in its ability to process and synthesize vast amounts of information—long complaints, multiple depositions, extensive exhibits—and construct a narrative that is faithful to the facts and rigorously grounded in the law. It is the model for when the sheer intellectual weight of the argument is the path to victory.

• Technically Rigorous: Stone's output is defined by its precision, making it ideal for complex summary judgment motions, technical briefs, or any document where legal and factual accuracy is paramount.
• Long-Context Mastery: It is specifically engineered to handle and reason over large volumes of user-provided documents, maintaining consistency and accuracy from start to finish.
• Fact-Faithful Precision: Stone excels at the precise use and recitation of case facts, ensuring your draft is deeply rooted in the evidentiary record you provide.
• Unadorned Clarity: The prose is straightforward and conservative, prioritizing the clear and direct communication of complex legal arguments without unnecessary embellishment.

Here's a glimpse into how Stone performs based on our rigorous internal evaluation framework:

Stone Model Evaluation Snapshot:

Stone's evaluation reveals an AI of unparalleled intellectual depth and analytical power. It achieves best-in-class scores in Thoroughness (98) and Legal Reasoning (96), showcasing its superior ability to construct complex, multi-layered arguments with flawless logic. This is complemented by an exceptional Overall Effectiveness (94), reflecting its capacity to produce technically sound and highly defensible drafts.

This profound analytical capability requires a deliberate pace; its Speed (35) is a direct trade-off for its incredible intellectual rigor and long-context processing. The writing is clear and direct, earning a strong Clarity of Writing (88), but its purpose is not stylistic elegance—it is the creation of a technically perfect legal structure. Stone is the specialist you deploy for your most complex cases, where the time invested in the draft is returned through its sheer intellectual and analytical force.

Our Inspiration: Chief Justice Harlan F. Stone

Our Stone AI is named in honor of Harlan Fiske Stone, the 12th Chief Justice of the United States. Before his time on the Court, Stone was the Dean of Columbia Law School and U.S. Attorney General, building a reputation as one of the great legal minds of his generation. As a Justice, he was known not for fiery rhetoric, but for his scholarly, deeply analytical, and intellectually honest approach to the law. He was a "scholar's judge" who could master the most complex of cases with quiet authority.

Our Stone model is built to embody this legacy. Think of Stone as the brilliant legal scholar who can synthesize a mountain of complex information into a flawlessly logical and technically sound argument. It does not seek to persuade with the elegant prose of Marshall or Ginsburg, but with the irrefutable force of its logic and its absolute command of the facts and the law. For the cases that will be won or lost on the technical merits and the deep, intricate details, Stone provides the architectural blueprint for a powerful and resilient legal argument.