How to Use Claude AI for Legal Work: A Complete Guide for Attorneys

What Is Claude AI and Why Should Lawyers Care?

Claude is an AI assistant built by Anthropic. It has become a widely adopted AI tool among legal professionals. Anthropic designed Claude for safety, accuracy, and nuanced reasoning — standards attorneys already apply.

Claude's 200,000-token context window lets you analyze entire contracts, briefs, and document sets in one conversation. It follows complex instructions, reasons through ambiguity, and produces structured output — contract review, memo drafting, and legal research in minutes instead of hours.

Key Legal Use Cases for Claude

Attorneys use Claude to cut hours from routine tasks:

• Contract Review: Upload a 50-page SaaS agreement and get a structured risk assessment in minutes. See our walkthrough in AI Contract Review: How to Use Claude for Due Diligence.
• Legal Research: Draft research memos with relevant analysis. Always verify citations independently.
• Document Drafting: Generate first drafts of complaints, motions, demand letters, and client communications.
• Deposition Summaries: Turn 200-page transcripts into organized summaries in minutes.
• Discovery Review: Analyze document productions for relevance and privilege issues.

Getting Started: The CRAFT Framework

The gap between a useless AI response and a brilliant one is the prompt. The CRAFT prompting framework was built for legal professionals:

• Context — Specify jurisdiction, practice area, and client situation
• Role — Tell Claude to act as a specific type of attorney
• Ask — State the specific deliverable you need
• Format — Define how you want the output structured
• Tone — Professional, persuasive, analytical, or plain English

Use this framework on every prompt.

Ethics and Confidentiality

Is it ethical? Yes — when done right. The ABA supports AI use, and over 30 state bars have published ethics opinions. The requirements: maintain competence (understand the tool), protect confidentiality (use Claude Team or Enterprise plans), and supervise all output. For the full rules, read our guide on ABA rules for AI-generated legal work in 2026.

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