Grok 4 vs Sonar Reasoning Pro
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4 by xAI wins on 3 of 5 benchmarks against Sonar Reasoning Pro by Perplexity, which leads on 2. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
Context: In context, Grok 4 scores 256K on Context Length compared to Sonar Reasoning Pro's 128K.
Pricing Comparison
Grok 4 costs $3.0/1M input tokens and $15.0/1M output tokens, while Sonar Reasoning Pro costs $2.0/1M input and $8.0/1M output. Sonar Reasoning Pro is the more affordable option for API usage.
Speed Comparison
Grok 4 generates output at 55 tok/s compared to Sonar Reasoning Pro's 22 tok/s, and the time to first token is 500 ms for Grok 4 versus 2380 ms for Sonar Reasoning Pro. Grok 4 delivers faster throughput.
Verdict
For developers prioritizing speed, Grok 4 has the edge. For those who value affordability, Sonar Reasoning Pro is the stronger choice.
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Grok 4 vs Sonar Reasoning Pro — FAQ
Which is better, Grok 4 or Sonar Reasoning Pro?
Grok 4 wins on more benchmarks overall (3 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Grok 4 compare to Sonar Reasoning Pro for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Grok 4 cheaper than Sonar Reasoning Pro?
Yes, Sonar Reasoning Pro is cheaper. Grok 4 costs $3.0/1M input and $15.0/1M output tokens. Sonar Reasoning Pro costs $2.0/1M input and $8.0/1M output tokens.
Which is faster, Grok 4 or Sonar Reasoning Pro?
Grok 4 is faster, generating output at 55 tok/s compared to 22 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Grok 4 vs Sonar Reasoning Pro comparison cover?
This comparison covers 5 benchmarks including Output Speed, Time to First Token, Input Cost, Output Cost, Context Length. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.