GPT-5 Pro vs Sonar Pro Search
Compare GPT-5 Pro by OpenAI against Sonar Pro Search by Perplexity, context windows of 400K vs 200K, tested across 42 shared challenges.
Our Verdict
GPT-5 Pro
Sonar Pro SearchRunner-up
No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, bigger context window, major provider backing.
Sonar Pro Search is 8.0x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GPT-5 Pro
Input
$15.00
Output
$120.00
Sonar Pro Search
Input
$3.00
5.0× cheaper
Output
$15.00
8.0× cheaper
Sonar Pro Search is cheaper on both — 5.0× input, 8.0× output
Writing DNA
Style Comparison
Similarity
67%
Sonar Pro Search uses 268.7x more bold
GPT-5 Pro
Sonar Pro Search
65%Vocabulary60%
15wSentence Length22w
0.32Hedging0.30
0.0Bold2.7
2.9Lists2.6
0.00Emoji0.00
0.00Headings2.08
0.01Transitions0.07
Based on 11 + 25 text responses
Research
What we learned reading every model
FAQ
