Claude Sonnet 4 vs Grok 4
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4 by xAI wins on 9 of 14 benchmarks against Claude Sonnet 4 by Anthropic, which leads on 3. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Grok 4 scores 1430 on Chatbot Arena ELO compared to Claude Sonnet 4's 1365, while Grok 4 scores 87.0% on MMLU-Pro compared to Claude Sonnet 4's 81.0%.
Coding: In coding, Grok 4 scores 90.0% on HumanEval+ compared to Claude Sonnet 4's 88.0%, while Claude Sonnet 4 scores 72.7% on SWE-bench Verified compared to Grok 4's 72.0%, while Grok 4 scores 65.0% on LiveCodeBench compared to Claude Sonnet 4's 58.0%.
Math: In math, Grok 4 scores 91.0% on MATH compared to Claude Sonnet 4's 85.0%, while Grok 4 scores 97.0% on GSM8K compared to Claude Sonnet 4's 94.5%.
Reasoning: In reasoning, Grok 4 scores 87.0% on GPQA Diamond compared to Claude Sonnet 4's 75.4%, while Grok 4 scores 50.0% on ARC-AGI compared to Claude Sonnet 4's 42.0%.
Context: In context, Grok 4 scores 256K on Context Length compared to Claude Sonnet 4's 200K.
Pricing Comparison
Claude Sonnet 4 costs $3.0/1M input tokens and $15.0/1M output tokens, while Grok 4 costs $3.0/1M input and $15.0/1M output. Both models are priced identically for input tokens.
Speed Comparison
Claude Sonnet 4 generates output at 75 tok/s compared to Grok 4's 55 tok/s, and the time to first token is 400 ms for Claude Sonnet 4 versus 500 ms for Grok 4. Claude Sonnet 4 delivers faster throughput.
Verdict
For developers prioritizing coding and speed, Claude Sonnet 4 has the edge. For those who value general intelligence and math, Grok 4 is the stronger choice.
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Claude Sonnet 4 vs Grok 4 — FAQ
Which is better, Claude Sonnet 4 or Grok 4?
Grok 4 wins on more benchmarks overall (9 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Sonnet 4 compare to Grok 4 for coding?
Claude Sonnet 4 is better for coding, scoring 72.7% on SWE-bench Verified compared to 72.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Sonnet 4 cheaper than Grok 4?
Both models are priced the same at $3.0/1M input tokens. Claude Sonnet 4 output costs $15.0/1M and Grok 4 output costs $15.0/1M.
Which is faster, Claude Sonnet 4 or Grok 4?
Claude Sonnet 4 is faster, generating output at 75 tok/s compared to 55 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Sonnet 4 vs Grok 4 comparison cover?
This comparison covers 14 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.