Claude Sonnet 4.5 vs Grok 4.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4.5 by xAI wins on 7 of 9 benchmarks against Claude Sonnet 4.5 by Anthropic, which leads on 1. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Grok 4.5 scores 39.1 on AA Intelligence Index compared to Claude Sonnet 4.5's 21.2.
Coding: In coding, Grok 4.5 scores 72.4 on AA Coding Index compared to Claude Sonnet 4.5's 52.1, while Grok 4.5 scores 1283 on Design Arena ELO compared to Claude Sonnet 4.5's 1184, while Grok 4.5 scores 1296 on Website Arena ELO compared to Claude Sonnet 4.5's 1202.
Reasoning: In reasoning, Grok 4.5 scores 42.1 on AA Agentic Index compared to Claude Sonnet 4.5's 17.5.
Context: In context, Claude Sonnet 4.5 scores 1.0M on Context Length compared to Grok 4.5's 500K.
Pricing Comparison
Claude Sonnet 4.5 costs $3.0/1M input tokens and $15.0/1M output tokens, while Grok 4.5 costs $2.0/1M input and $6.0/1M output. Grok 4.5 is the more affordable option for API usage.
Verdict
Grok 4.5 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Sonnet 4.5 vs Grok 4.5 — FAQ
Which is better, Claude Sonnet 4.5 or Grok 4.5?
Grok 4.5 wins on more benchmarks overall (7 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Sonnet 4.5 compare to Grok 4.5 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Claude Sonnet 4.5 cheaper than Grok 4.5?
Yes, Grok 4.5 is cheaper. Claude Sonnet 4.5 costs $3.0/1M input and $15.0/1M output tokens. Grok 4.5 costs $2.0/1M input and $6.0/1M output tokens.
Which is faster, Claude Sonnet 4.5 or Grok 4.5?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Claude Sonnet 4.5 vs Grok 4.5 comparison cover?
This comparison covers 9 benchmarks including Input Cost, Output Cost, Context Length, AA Intelligence Index, AA Coding Index, AA Agentic Index, Cached Input Cost, Design Arena ELO, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.