Legal

Customizing a general-purpose LLM as a legal copilot

Uses a general-purpose AI model (Claude) in legal practice, preferring it over specialized legal AI products, and teaches it the user’s specific way of practicing law so it can assist as a practice-aligned copilot.

Why the human is still essential here

The lawyer must define how they practice, provide the right context/instructions, and apply legal judgment—reviewing and taking responsibility for any work product and advice.

How people use this

Firm-style contract drafting and clause suggestions

AI uses the lawyer’s preferred structure, fallback positions, and precedent language to draft first-pass contract sections and propose alternative clauses for attorney redline and approval.

Claude / ChatGPT

Transaction diligence issue spotting and checklisting

AI summarizes provided deal documents, flags missing items, and generates a diligence question list and issues tracker aligned to the lawyer’s established diligence workflow for review.

Claude / ChatGPT

Client email and internal memo first drafts

AI turns bullet-point notes and deal facts into client-ready emails and internal strategy memos in the lawyer’s tone and formatting for final legal judgment and sign-off.

Claude / Microsoft Word

Community stories (2)

Great piece on using Claude AI to speed up your legal work, with conclusions surprisingly aligned with what we see in AI coding.

Great piece on using Claude AI to speed up your legal work, with conclusions surprisingly aligned with what we see in AI coding. I use it almost every day!

This year, AI will redefine many industries. It's the biggest improvement I've seen since I first encountered GPT-3 in 2020. Don't be the last to embrace the new reality, because it will reach you sooner than you think.

Dominik PosmykCo-founder of @quickchatai (YC S18)

Mar 2, 2026

Why I use Claude as my legal AI copilot (not specialized legal tools)

Over the past couple weeks I've had a ton of lawyers reach out to ask me what AI tech I'm using in my legal practice.

The answer, increasingly, is @claudeai. That's basically it.

Not Harvey. Not CoCounsel. Not Spellbook. A general-purpose AI that I've taught how I practice law.

Here's how I use it:
...

Zack ShapiroManaging Partner at Rains LLP (AI-enabled corporate lawyer)

Feb 27, 2026