DeepSeek

When DeepSeek released its R1 model in early 2025, it sent shockwaves through the AI industry. A Chinese startup had built a model matching GPT-4 in many benchmarks at a fraction of the cost. The response from Silicon Valley was visible: Nvidia's share price dropped, and every major AI lab started asking questions about their cost assumptions.

For UK business owners, the story is simpler: DeepSeek is very good, and it is free to use.

What DeepSeek is good at

DeepSeek has been benchmarked against the leading models from OpenAI, Anthropic, and Google. In coding and mathematical reasoning, it competes at the top level. If you write code, work with data, or need an AI that can follow complex logical chains, DeepSeek R1 and V3 are worth serious attention.

For everyday business use, the chat interface at chat.deepseek.com works well for drafting, summarising, research, and answering questions. The quality is noticeably better than older free tools and comparable to the best paid options.

The pricing story

DeepSeek operates on a dramatically different cost structure to its American rivals. The API pricing is a fraction of what OpenAI charges, which matters if you are building applications or processing large volumes of text. Developers building AI-powered products have taken notice.

For individual users, the main interface is simply free. No subscription required, no usage caps that kick in after a few conversations.

The privacy question

DeepSeek is a Chinese company, and this matters for some UK businesses. Under Chinese law, companies can be required to share data with the state. If you are processing sensitive client information, confidential contracts, or anything regulated, you should be cautious about which AI tools you use and read their privacy policies carefully.

This is not a reason to avoid DeepSeek entirely. For non-sensitive tasks, brainstorming, writing assistance, coding help, general research, the risk profile is not dramatically different from using any other AI tool. But for regulated industries or sensitive data, this is worth factoring in.

Many users access DeepSeek models through third-party services like Groq or Perplexity, which process the queries on infrastructure outside China. This is an option if the direct privacy concern is a blocker for you.

Open source and the ecosystem

One of DeepSeek's most significant contributions is releasing its models as open source. This means anyone can download and run the models themselves, with no data sent anywhere. For businesses with the technical capability, this is genuinely useful: all the power of a top-tier AI model, running on your own hardware, with full control over your data.

The open-source release has also seeded a wide ecosystem of applications, fine-tuned versions, and integrations built by the developer community.

Who should try it

DeepSeek is a strong choice for developers, anyone doing coding or technical work, and cost-conscious users who want a capable AI without a monthly subscription. If you have been put off by ChatGPT Plus or Claude Pro pricing, DeepSeek gives you a genuinely competitive free alternative.

UK businesses processing sensitive data should think carefully about data handling, as with any AI tool. For general use, it is one of the best free options available.

Pricing

Free: Full access to the chat interface with no subscription. API: Pay-as-you-go, priced significantly cheaper than OpenAI's equivalent offerings. Ideal for developers and businesses building AI into their products.