DeepSeek

What is DeepSeek?

DeepSeek is a Chinese AI lab known for releasing strong open-weight language models that anyone can self-host, alongside a free hosted chat app. Its models are frequently benchmarked against GPT and Claude for reasoning and coding at a fraction of the typical cost.

Key features

• Free web and mobile chat app with no hard usage wall
• Open-weight models that can be downloaded and self-hosted
• Strong reasoning mode (DeepThink) for step-by-step problem solving
• Competitive coding and math performance for the price
• Low-cost API pricing compared to closed-model providers

How to get started

1. Go to chat.deepseek.com and sign up for a free account
2. Start a chat and enable DeepThink mode for harder problems
3. Use the API or download open weights for self-hosted deployments
4. Compare answers against your usual assistant for cost-sensitive tasks

Use cases

• Cost-sensitive coding and reasoning tasks
• Self-hosting an LLM without relying on a closed API
• Step-by-step math and logic problem solving
• High-volume API usage where per-token cost matters

DeepSeek alternatives

• ChatGPT: ChatGPT's models are closed-weight, so you can't self-host or fine-tune the base model the way you can with DeepSeek's.
• Groq: Groq isn't a model itself, it's a fast inference platform that can run DeepSeek's and other open models.
• Qwen: Qwen is Alibaba's open-weight family, a similar bet on open models with different benchmark strengths.
• Z.ai: Z.ai is another open-weight competitor with a similar free-chat-app-plus-API approach.

FAQ

Is DeepSeek free to use?

DeepSeek's plans: Free chat app, open-weight models. Pricing and free-tier limits change over time, so check the official site above for the latest details.

What is DeepSeek used for?

Open-weight model family with a free, fast chat interface.

Who is DeepSeek best for?

DeepSeek is a good fit for cost-sensitive coding and reasoning tasks, or self-hosting an LLM without relying on a closed API.

What are the alternatives to DeepSeek?

Commonly compared alternatives include ChatGPT, Groq, and Qwen, see the comparison above for how they differ.

What's the best DeepSeek alternative?

ChatGPT is the most commonly recommended swap: chatGPT's models are closed-weight, so you can't self-host or fine-tune the base model the way you can with DeepSeek's. Which one is actually best depends on which of those tradeoffs matters more for what you're doing.