How to Beginner to Intermediate · 3 min read

How to draft legal documents with AI

Q: How to draft legal documents with AI

Use a large language model like gpt-4o via the OpenAI Python SDK to generate legal document drafts by providing clear prompts and context. Automate drafting by feeding contract clauses or legal requirements as input and refining outputs with iterative prompts.

Quick answer

Use a large language model like gpt-4o via the OpenAI Python SDK to generate legal document drafts by providing clear prompts and context. Automate drafting by feeding contract clauses or legal requirements as input and refining outputs with iterative prompts.

PREREQUISITES

Python 3.8+
OpenAI API key (free tier works)
pip install openai>=1.0

Setup

Install the openai Python package and set your API key as an environment variable for secure access.

bash

pip install openai>=1.0

output

Collecting openai
  Downloading openai-1.x.x-py3-none-any.whl (xx kB)
Installing collected packages: openai
Successfully installed openai-1.x.x

Step by step

This example shows how to draft a simple legal agreement clause using gpt-4o. Provide a clear prompt describing the document type and key terms.

python

import os
from openai import OpenAI

client = OpenAI(api_key=os.environ["OPENAI_API_KEY"])

prompt = (
    "Draft a simple non-disclosure agreement clause that protects confidential information "
    "between two parties, including definitions and obligations."
)

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": prompt}]
)

print("Drafted clause:\n", response.choices[0].message.content)

output

Drafted clause:
This Non-Disclosure Agreement ("Agreement") is entered into by and between the Disclosing Party and the Receiving Party. "Confidential Information" means any information disclosed that is proprietary or confidential. The Receiving Party agrees to keep all Confidential Information strictly confidential and not disclose it to any third party without prior written consent. This obligation shall survive termination of this Agreement.

Common variations

You can use asynchronous calls with asyncio for non-blocking drafting, switch to other models like gpt-4o-mini for faster responses, or implement streaming to display partial drafts as they generate.

python

import os
import asyncio
from openai import OpenAI

async def draft_clause():
    client = OpenAI(api_key=os.environ["OPENAI_API_KEY"])
    prompt = (
        "Draft a confidentiality clause for a service agreement, specifying duration and exclusions."
    )
    response = await client.chat.completions.create(
        model="gpt-4o-mini",
        messages=[{"role": "user", "content": prompt}]
    )
    print("Drafted clause async:\n", response.choices[0].message.content)

asyncio.run(draft_clause())

output

Drafted clause async:
The Receiving Party shall maintain the confidentiality of all proprietary information disclosed by the Disclosing Party for a period of three years. Exclusions include information already known or independently developed by the Receiving Party. Disclosure is permitted only with prior written consent.

Troubleshooting

If the draft is too generic, provide more detailed context or examples in your prompt.
If the output is cut off, increase max_tokens in the API call.
For legal accuracy, always have a qualified attorney review AI-generated drafts before use.

✅

Key Takeaways

Use clear, detailed prompts to guide AI in drafting precise legal clauses.
Leverage gpt-4o for high-quality legal text generation with the OpenAI SDK.
Incorporate async or streaming for efficient, real-time drafting workflows.
Always validate AI-generated legal documents with professional legal review.

Verified 2026-04 · gpt-4o, gpt-4o-mini

Verify ↗