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DeepSeek model license and usage terms

Quick answer

DeepSeek models are accessed via API under terms that allow commercial and research use but restrict redistribution or reverse engineering. Usage requires an API key and compliance with DeepSeek's service agreement, which governs data privacy, rate limits, and content policies.

PREREQUISITES

Python 3.8+
DeepSeek API key
pip install openai>=1.0

Setup

To use DeepSeek models, you need to obtain an API key by registering on the DeepSeek platform. Install the openai Python SDK to interact with the API, as DeepSeek uses an OpenAI-compatible interface.

bash

pip install openai>=1.0

Step by step

Here is a basic example to call the DeepSeek chat model using the OpenAI-compatible SDK. This demonstrates authorized usage under the license terms.

python

import os
from openai import OpenAI

client = OpenAI(api_key=os.environ["DEEPSEEK_API_KEY"], base_url="https://api.deepseek.com")

response = client.chat.completions.create(
    model="deepseek-chat",
    messages=[{"role": "user", "content": "Explain DeepSeek model license terms."}]
)

print(response.choices[0].message.content)

output

DeepSeek models are provided under a license that permits API usage for commercial and research purposes while prohibiting redistribution and reverse engineering. Users must comply with rate limits and content policies.

Common variations

You can use different DeepSeek models like deepseek-reasoner for reasoning tasks. Async calls are possible by integrating with async HTTP clients, but the official SDK uses synchronous calls. Always ensure your usage complies with the latest terms on DeepSeek's website.

Troubleshooting

If you receive authentication errors, verify your DEEPSEEK_API_KEY environment variable is set correctly. For rate limit errors, reduce request frequency or contact DeepSeek support. Always check for updates to the license terms to avoid compliance issues.

✅

Key Takeaways

DeepSeek models require an API key and adherence to their licensing terms for usage.
Commercial and research use is allowed, but redistribution and reverse engineering are prohibited.
Use the OpenAI-compatible SDK with the correct base_url to access DeepSeek models.
Check for rate limits and content policies to avoid service interruptions.
Always verify the latest license terms on DeepSeek's official site before integration.

Verified 2026-04 · deepseek-chat, deepseek-reasoner

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