DeepSeek (China) · last updated 2026-10-14
DeepSeek
DeepSeek is a Chinese AI lab whose chat interface at chat.deepseek.com gained global prominence in early 2025 when DeepSeek-R1 launched at a fraction of the cost of comparable Western models. The current model family is V4 (Pro and Flash); V4.1 Flash was announced on 2026-09-10. Strong in Chinese-language queries, with growing English-language usage as a free alternative to ChatGPT and Claude.
Grounding model
DeepSeek V4 models with optional web search. DeepSeek does not publish its search index or retrieval design, so the grounding sources are not documented.
Citation style
Not documented by DeepSeek. The chat interface shows sources when web search is enabled; we have not verified the layout.
What it rewards
- Pages with clean structured data and clear semantic HTML
- Recent dates and dating discipline
- Content with both English and Chinese coverage when relevant to the audience
- Specific factual claims with attribution
What it penalizes
- Pages blocked from broad web crawlers
- Generic listicle content with weak per-item differentiation
- Content with poor mobile or fast-loading performance