DeepSeek — AI Glossary

DeepSeek is a Chinese artificial intelligence company that develops open-weight large language models. Founded in 2023 as a subsidiary of the quantitative hedge fund High-Flyer, DeepSeek gained widespread attention with its DeepSeek-V3 and DeepSeek-R1 models, which demonstrated performance competitive with leading closed-source models while being released under permissive licenses.

Why DeepSeek Matters

DeepSeek challenged the assumption that frontier AI requires massive compute budgets concentrated in a few Western labs. Its models achieved strong results on coding, math, and reasoning benchmarks at a fraction of the reported training cost of comparable systems — sparking industry-wide debate about compute efficiency and the sustainability of the scaling-only approach.

For the open-source AI ecosystem, DeepSeek's releases are significant because they provide high-capability base models that researchers and companies can fine-tune and deploy without API dependencies. The models have been widely adopted in China and increasingly globally, particularly for applications where data sovereignty or self-hosting is a requirement. Anthropic and other Western labs have cited DeepSeek's progress as evidence that AI capability gains are diffusing faster than expected.

How DeepSeek Works

DeepSeek's architecture incorporates several efficiency-focused design choices:

• Mixture-of-Experts (MoE): DeepSeek-V3 uses an MoE architecture that activates only a subset of parameters per token, reducing inference cost while maintaining a large total parameter count
• Multi-head latent attention: A modified attention mechanism that compresses key-value caches, lowering memory requirements during inference
• Reinforcement learning for reasoning: DeepSeek-R1 applies RL techniques to improve chain-of-thought reasoning, producing step-by-step problem solving without relying solely on supervised fine-tuning

The models are available through DeepSeek's API and as downloadable weights on Hugging Face, supporting both cloud and on-premise deployment.

Related Terms

• Anthropic: U.S.-based AI safety company building Claude, one of DeepSeek's primary competitors in the foundation model space
• Claude: Anthropic's family of large language models, often benchmarked alongside DeepSeek's releases
• Agentic: A paradigm for AI systems that act autonomously — an area where both DeepSeek and Western models are increasingly being applied

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