GPT-5.1 vs Sonar Pro Search
Compare GPT-5.1 by OpenAI against Sonar Pro Search by Perplexity, in 2 community votes, gpt-5.1 and sonar pro search are closely matched, context windows of 400K vs 200K, tested across 52 shared challenges.
Reasoning: GPT-5.1 and Sonar Pro Search are tied
Our Verdict
GPT-5.1Winner
Sonar Pro SearchRunner-up
Votes are tied. GPT-5.1 has a 400K context window vs 200K — handles longer documents.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1
Input
$1.25
2.4× cheaper
Output
$10.00
1.5× cheaper
Sonar Pro Search
Input
$3.00
Output
$15.00
GPT-5.1 is cheaper on both — 2.4× input, 1.5× output
Writing DNA
Style Comparison
Similarity
45%
Sonar Pro Search uses 3.4x more headings
GPT-5.1
Sonar Pro Search
62%Vocabulary60%
19wSentence Length22w
0.29Hedging0.30
3.5Bold2.7
7.2Lists2.6
0.00Emoji0.00
0.61Headings2.08
0.03Transitions0.07
Based on 14 + 25 text responses
Research
What we learned reading every model
FAQ
