Compare xAI: Grok 4 by xAI against Sonar Pro Search by Perplexity, context windows of 256K vs 200K, tested across 52 shared challenges. Updated April 2026.
xAI: Grok 4 and Sonar Pro Search are both competitive models. xAI: Grok 4 costs $3/M input tokens vs $3/M for Sonar Pro Search. Context windows: 256K vs 200K tokens. Compare their real outputs side by side below.
xAI: Grok 4 is made by xai while Sonar Pro Search is from perplexity. xAI: Grok 4 has a 256K token context window compared to Sonar Pro Search's 200K. On pricing, xAI: Grok 4 costs $3/M input tokens vs $3/M for Sonar Pro Search.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
xAI: Grok 4 uses 7.0x more emoji
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

Compare xAI: Grok 4 by xAI against Sonar Pro Search by Perplexity, context windows of 256K vs 200K, tested across 52 shared challenges. Updated April 2026.
xAI: Grok 4 and Sonar Pro Search are both competitive models. xAI: Grok 4 costs $3/M input tokens vs $3/M for Sonar Pro Search. Context windows: 256K vs 200K tokens. Compare their real outputs side by side below.
xAI: Grok 4 is made by xai while Sonar Pro Search is from perplexity. xAI: Grok 4 has a 256K token context window compared to Sonar Pro Search's 200K. On pricing, xAI: Grok 4 costs $3/M input tokens vs $3/M for Sonar Pro Search.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
xAI: Grok 4 uses 7.0x more emoji
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

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47 fights queued
35+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy