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. Updated April 2026.
Which is better, GPT-5.1 or Sonar Pro Search?
GPT-5.1 and Sonar Pro Search are closely matched based on 2 community votes. GPT-5.1 costs $1.25/M input tokens vs $3/M for Sonar Pro Search. Context windows: 400K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1 and Sonar Pro Search
GPT-5.1 is made by openai while Sonar Pro Search is from perplexity. GPT-5.1 has a 400K token context window compared to Sonar Pro Search's 200K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $3/M for Sonar Pro Search. In community voting, In 2 community votes, GPT-5.1 and Sonar Pro Search are closely matched.
In 2 community votes, GPT-5.1 and Sonar Pro Search are closely matched. GPT-5.1 and Sonar Pro Search perform similarly across challenge categories. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Votes are tied. GPT-5.1 has a 400K context window vs 200K — handles longer documents.
Style Comparison
Sonar Pro Search uses 3.4x more headings
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