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Decrypting the Dark Side of the Moon o1: Long-CoT is the Key, Model Thinking Needs to 'Cast a Long Line'

Dark Side of the Moon researcher Flood Sung recently published a lengthy article, revealing for the first time the development ideas behind the k1.5 model and deeply reflecting on the technological insights brought by the OpenAI o1 model. According to Flood Sung, the importance of Long-CoT (Long Chain of Thought) was actually validated over a year ago by Tim Zhou Xinyu, co-founder of the Dark Side of the Moon. By training small models for multi-digit calculations and transforming the fine-grained calculation processes into Long Chain of Thought data for SFT (Supervised Fine-Tuning).

13.7k 8 hours ago

Kimi Launches New SOTA Model: k1.5 Multimodal Thinking Model Debuts

Recently, Beijing Dark Side of the Moon Technology Co., Ltd. announced a significant technological upgrade for its intelligent assistant Kimi, introducing the brand new k1.5 Multimodal Thinking Model. This model has reached industry-leading levels in multimodal reasoning and general reasoning capabilities, marking another breakthrough for Kimi in the field of artificial intelligence.

23.5k yesterday

Kimi Launches New SOTA Model: k1.5 Multimodal Thinking Model Debuts

AI Products

Kimi k1.5

Kimi k1.5 is a multimodal language model enhanced by reinforcement learning, focused on improving reasoning and logical abilities.

Model training and deployment

26.8k

Models

o3-mini

Openai

$7.7

Input tokens/M

$30.8

Output tokens/M

200

Context Length

Qianfan-Lightning

Baidu

Input tokens/M

Output tokens/M

128

Context Length

qwen3-omni-flash-realtime

Alibaba

$3.9

Input tokens/M

$15.2

Output tokens/M

Context Length

Doubao-1.5-pro-32k

Bytedance

$0.8

Input tokens/M

Output tokens/M

128

Context Length

Hunyuan-T1-20250822

Tencent

Input tokens/M

Output tokens/M

Context Length

Hunyuan-T1-latest

Tencent

Input tokens/M

Output tokens/M

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DeepSeek-V3.1

Deepseek

Input tokens/M

$12

Output tokens/M

128

Context Length

GPT OSS 120B

Openai

$0.63

Input tokens/M

$3.15

Output tokens/M

131

Context Length

Doubao-1.5-thinking-pro

Bytedance

Input tokens/M

$16

Output tokens/M

128

Context Length

Doubao-1.5-UI-TARS

Bytedance

$3.5

Input tokens/M

$12

Output tokens/M

128

Context Length

Spark Medical Large Model - Lite

Iflytek

Input tokens/M

Output tokens/M

Context Length

Qwen3-14B

Alibaba

Input tokens/M

Output tokens/M

Context Length

ERNIE X1 Turbo

Baidu

Input tokens/M

Output tokens/M

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Gemma 3n E2B Instructed

Google

Input tokens/M

Output tokens/M

Context Length

Hunyuan-A13B

Tencent

$0.5

Input tokens/M

Output tokens/M

224

Context Length

Hunyuan-T1-Vision

Tencent

Input tokens/M

Output tokens/M

Context Length

Doubao-embedding

Bytedance

$0.5

Input tokens/M

Output tokens/M

Context Length

Doubao-1.5-lite-32k

Bytedance

$0.3

Input tokens/M

$0.6

Output tokens/M

Context Length

Pangu-NLP-N2-Reasoner-32K-3.0.1.1

Huawei

Input tokens/M

Output tokens/M

Context Length

Pangu-NLP-N1-Reasoner-128K-3.0.1.1

Huawei

Input tokens/M

Output tokens/M

128

Context Length

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