DeepSeek: GPT-4-Level AI at a Fraction of the Cost

What Is DeepSeek?

DeepSeek is a Chinese AI company that has shocked the industry by producing models that rival GPT-4 and Claude in capability — at roughly 1/20th of the cost. The web chat interface is free to use. The API costs pennies compared to OpenAI's pricing.

For people learning AI, this matters enormously. It means you can experiment with high-level AI capabilities without subscribing to anything.

What It Does Well

Reasoning

DeepThink (DeepSeek-R1) is a reasoning model — meaning it thinks through problems step by step before answering, similar to OpenAI's o1. For complex tasks involving logic, mathematics, or multi-step analysis, this produces noticeably better results than standard chat models.

You can watch its thinking process unfold, which is genuinely educational. Seeing how an AI breaks down a problem is one of the best ways to understand how these systems actually work.

Coding

DeepSeek writes clean, working code across most popular languages. It's particularly strong at explaining what code does and debugging — two skills that are exactly what a learner needs.

Writing

DeepSeek handles writing tasks competently — emails, reports, summaries, creative writing. It won't win literary prizes, but neither will ChatGPT's free tier. For everyday writing tasks, it's more than sufficient.

Cost

Here's where DeepSeek stands alone. The API pricing is roughly:

• DeepSeek-R1 (reasoning): about £0.20 per million input tokens
• OpenAI's o1 (comparable reasoning): about £5.00 per million input tokens

That's a 25x difference. If you're building something that uses AI at scale, this matters. If you're just learning, the free web interface is more than enough.

Where It Falls Short

Data Sovereignty

DeepSeek is a Chinese company. Data is processed on servers in China. For personal learning, research, and non-sensitive tasks, this is fine. For sensitive business or personal data, you should think carefully about what you share. This is the same principle we teach at StarCaller: understand your tools before you trust them with anything important.

Web Interface Simplicity

The web interface is basic — no project organisation, no custom instructions, no document upload (on the free tier). If you're used to ChatGPT's polished interface, DeepSeek feels sparse. But the underlying capability is what matters, and that's genuinely impressive.

Occasional Saturation

During high-traffic periods, the free web interface can be slow or temporarily unavailable. This is the trade-off for free access to a powerful model.

How to Use It

1. Go to chat.deepseek.com (free account required).
2. Start with a simple task: "Explain [topic] in simple terms."
3. Try the DeepThink button for complex reasoning tasks — watch how it breaks the problem down.
4. For coding: paste code and ask "What does this do?" or "Find the bug."

Why It Belongs in Your Toolkit

Having access to a free, powerful reasoning model changes how you approach problems. When something is genuinely complex — a multi-step analysis, a tricky coding problem, a logical puzzle — DeepThink gives you heavyweight capability without a paywall.

Pair it with NotebookLM (for your own documents) and you have a remarkably capable research and analysis setup for zero cost.

The Sovereignty Angle

We teach sovereignty: own your tools, don't rent your thinking. Part of that is knowing what's available beyond the heavily marketed options. DeepSeek proves you don't need a £20/month subscription to access top-tier AI capability.

Curious about building a personal AI toolkit that fits your needs and budget? Book a free discovery call.