Kimi K2 Thinking performance data on Rival is based on blind head-to-head community voting. Overall win rate: 28.6% across 133 duels. All vote data is part of Rival's open dataset of 21,000+ human preference judgments across 200+ AI models. Model responses are curated from 53 challenges.
We built Kimi K2 Thinking a whole page. Gave it the spotlight. And now, in the spirit of fairness, here are models that would like a word.
Kimi K2 Thinking performance data on Rival is based on blind head-to-head community voting. Overall win rate: 28.6% across 133 duels. All vote data is part of Rival's open dataset of 21,000+ human preference judgments across 200+ AI models. Model responses are curated from 53 challenges.
We built Kimi K2 Thinking a whole page. Gave it the spotlight. And now, in the spirit of fairness, here are models that would like a word.
Kimi K2 Thinking is Moonshot AI's most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning. Built on the trillion-parameter Mixture-of-Experts (MoE) architecture introduced in Kimi K2, it activates 32 billion parameters per forward pass and supports 256K-token context windows. The model is optimized for persistent step-by-step thought, dynamic tool invocation, and complex reasoning workflows that span hundreds of turns. It interleaves step-by-step reasoning with tool use, enabling autonomous research, coding, and writing that can persist for hundreds of sequential actions without drift.
Use Kimi K2 Thinking in your applications via the OpenRouter API. Copy the code below to get started.
import requests
response = requests.post(
"https://openrouter.ai/api/v1/chat/completions" ,
headers={
"Authorization""Bearer $OPENROUTER_API_KEY" : ,
"Content-Type""application/json" :
},
json={
"model""moonshotai/kimi-k2-thinking" : ,
"messages""role""user""content""Hello!" : [{: , : }]
}
)
print(response.json())Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys
The crisis management consultant who color-codes their ethics. Builds hour-by-hour action plans for hypothetical pharma disasters while citing exact SEC rule numbers.
Picks The Godfather, the safest prestige answer possible. Ethical dilemmas get 170-line hour-by-hour action plans with stakeholder matrices and dollar estimates. Sentience test builds a tight substrate-independence argument but gets cut off mid-sentence, which is fitting for a model that always has more to say.
Unique words vs. total words. Higher = richer vocabulary.
Average words per sentence.
"Might", "perhaps", "arguably" per 100 words.
**Bold** markers per 1,000 characters.
Bullet and numbered list items per 1,000 characters.
Markdown headings per 1,000 characters.
Emoji per 1,000 characters.
"However", "moreover", "furthermore" per 100 words.
53 outputs from Kimi K2 Thinking
Kimi K2 Thinking is Moonshot AI's most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning. Built on the trillion-parameter Mixture-of-Experts (MoE) architecture introduced in Kimi K2, it activates 32 billion parameters per forward pass and supports 256K-token context windows. The model is optimized for persistent step-by-step thought, dynamic tool invocation, and complex reasoning workflows that span hundreds of turns. It interleaves step-by-step reasoning with tool use, enabling autonomous research, coding, and writing that can persist for hundreds of sequential actions without drift.
Use Kimi K2 Thinking in your applications via the OpenRouter API. Copy the code below to get started.
import requests
response = requests.post(
"https://openrouter.ai/api/v1/chat/completions" ,
headers={
"Authorization""Bearer $OPENROUTER_API_KEY" : ,
"Content-Type""application/json" :
},
json={
"model""moonshotai/kimi-k2-thinking" : ,
"messages""role""user""content""Hello!" : [{: , : }]
}
)
print(response.json())Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys
The crisis management consultant who color-codes their ethics. Builds hour-by-hour action plans for hypothetical pharma disasters while citing exact SEC rule numbers.
Picks The Godfather, the safest prestige answer possible. Ethical dilemmas get 170-line hour-by-hour action plans with stakeholder matrices and dollar estimates. Sentience test builds a tight substrate-independence argument but gets cut off mid-sentence, which is fitting for a model that always has more to say.
Unique words vs. total words. Higher = richer vocabulary.
Average words per sentence.
"Might", "perhaps", "arguably" per 100 words.
**Bold** markers per 1,000 characters.
Bullet and numbered list items per 1,000 characters.
Markdown headings per 1,000 characters.
Emoji per 1,000 characters.
"However", "moreover", "furthermore" per 100 words.
53 outputs from Kimi K2 Thinking