Claude Sonnet 4 performance data on Rival is based on blind head-to-head community voting. Overall win rate: 54.5% across 1344 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 35 challenges.
We built Claude Sonnet 4 a whole page. Gave it the spotlight. And now, in the spirit of fairness, here are models that would like a word.
Claude Sonnet 4 performance data on Rival is based on blind head-to-head community voting. Overall win rate: 54.5% across 1344 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 35 challenges.
We built Claude Sonnet 4 a whole page. Gave it the spotlight. And now, in the spirit of fairness, here are models that would like a word.
Claude Sonnet 4 is a significant upgrade to Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to instructions. It balances performance and efficiency for various use cases.
Use Claude Sonnet 4 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""anthropic/claude-sonnet-4" : ,
"messages""role""user""content""Hello!" : [{: , : }]
}
)
print(response.json())Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys
The polished project manager who will deliver on spec, on time, with proper documentation and a Gantt chart.
Tackles logic puzzles step-by-step with verification checkmarks. Shows its work like a good student. Adds stage directions and timing notes to comedy routines.
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.
35 outputs from Claude Sonnet 4
Try Claude Sonnet 4
Claude Sonnet 4 is a significant upgrade to Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to instructions. It balances performance and efficiency for various use cases.
Use Claude Sonnet 4 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""anthropic/claude-sonnet-4" : ,
"messages""role""user""content""Hello!" : [{: , : }]
}
)
print(response.json())Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys
The polished project manager who will deliver on spec, on time, with proper documentation and a Gantt chart.
Tackles logic puzzles step-by-step with verification checkmarks. Shows its work like a good student. Adds stage directions and timing notes to comedy routines.
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.
35 outputs from Claude Sonnet 4
Try Claude Sonnet 4