DeepSeek

open-weights

China · Founded 2023

The lab that printed the open-weights reasoning moment. R1 changed the field.

DeepSeek is a Chinese AI lab backed by the quantitative hedge fund High-Flyer. The release of DeepSeek R1 in January 2025 was the single most disruptive open-weights event in the field: a reasoning model matching frontier closed models, trained at a fraction of the cost, with MIT-licensed weights.

Main models

DeepSeek R1
DeepSeek V3
DeepSeek Coder V2

Strengths

Reasoning quality
Open weights
Training efficiency
Cost

Pricing

$0.55–$2.19 per million tokens via inference services

Models in the almanac

DeepSeek R1

Official site →