AI Research Atlas

DeepSeek-R1-Lite-Preview

DeepSeek · 20 November 2024

Among the first public o1-style reasoning models outside OpenAI: shows its thinking live, with AIME scores rising as thought length grows.

A reasoning model on chat.deepseek.com, claimed at o1-preview level on AIME and MATH with a transparent chain of thought and a published test-time scaling curve. Weights and API were 'coming soon'; neither shipped until R1 two months later.

Date
Wednesday, 20 November 2024
Lab
DeepSeek
Kind
model
Access
app only

Claimed o1-preview parity is company-stated (benchmark scores were only in a chart). Alibaba's QwQ-32B-Preview followed on 2024-11-28; precedence among non-OpenAI reasoning previews is contested.

Sources

  1. api-docs.deepseek.com/news/news1120

This record was checked against its sources on 6 October 2026. How we check

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