DeepSeek

DeepSeek is an AI research lab whose reasoning and language models are openly available, powering a popular chat assistant and cheap developer APIs.

Overview

DeepSeek drew global attention with high-performing open-weight models in reasoning and coding, offered at unusually low API prices. Its chat assistant handles math, code, writing, and analysis with strong chain-of-thought reasoning, and the models are widely adopted by developers building on open infrastructure. The combination of open releases and competitive quality made DeepSeek a benchmark reference for cost-efficient AI. Its assistant supports file upload, web search, and deep thinking modes. The open releases let companies audit model behavior and fine-tune for specialized domains such as finance or law. Its reasoning traces are visible, which helps users understand how conclusions were reached and spot errors early.

Key Features

• Open-weight reasoning models strong in math and coding
• Low-cost API pricing that made headlines for accessibility
• Deep thinking mode with visible step-by-step reasoning
• File upload, web search, and document analysis in chat
• Open ecosystem allowing self-hosting and fine-tuning
• Chinese and English support with strong technical fluency
• Developer tooling with OpenAI-compatible endpoints for painless integration

Pricing

DeepSeek’s chat assistant is free to use, while API access is billed per token at rates significantly below most commercial peers. Self-hosting open-weight models is free of licensing cost, though infrastructure expenses apply; commercial usage terms accompany the open releases. Self-hosting costs depend on GPU infrastructure rather than per-token fees.

Who Is It For

DeepSeek serves developers, researchers, and technically inclined users who want strong reasoning models at minimal cost, including teams deploying AI on their own infrastructure. It fits budget-conscious builders and enterprises exploring open models. Its pricing pressure has influenced the broader market for reasoning model access.

FAQ

Is DeepSeek free to use?

Yes. The chat assistant is free; API calls are billed by usage, and open-weight models can be self-hosted without license fees.

Does DeepSeek offer an API?

Yes. DeepSeek offers an OpenAI-compatible API at competitive token pricing, which simplifies migration for developers.

How does DeepSeek compare to alternatives?

DeepSeek competes on open access and price-performance, while ChatGPT and Claude offer more polished consumer features and broader tool ecosystems.

Are DeepSeek models really open weight?

Yes. DeepSeek publishes model weights for several of its major releases, allowing researchers and companies to run and adapt them under the accompanying license terms.

Can DeepSeek models run locally?

Yes. Published open-weight models can be deployed on your own GPU infrastructure using standard inference frameworks without contacting DeepSeek’s servers.