Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Claude Sonnet 4.5 is clearly ahead on the aggregate, 59 to 23. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Sonnet 4.5's sharpest advantage is in reasoning, where it averages 89.9 against 21.7. The single biggest benchmark swing on the page is SimpleQA, 91% to 21.7%.
Claude Sonnet 4.5 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $0.30 input / $0.50 output per 1M tokens for Grok 3 Mini. That is roughly 30.0x on output cost alone. Claude Sonnet 4.5 gives you the larger context window at 200K, compared with 128K for Grok 3 Mini.
Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. Grok 3 Mini only becomes the better choice if you want the cheaper token bill.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Claude Sonnet 4.5
82.1
Grok 3 Mini
41.5
Benchmark data for this category is coming soon.
Claude Sonnet 4.5
89.9
Grok 3 Mini
21.7
Claude Sonnet 4.5
87.2
Grok 3 Mini
74.1
Benchmark data for this category is coming soon.
Benchmark data for this category is coming soon.
Claude Sonnet 4.5
96
Grok 3 Mini
39.7
Claude Sonnet 4.5 is ahead overall, 59 to 23. The biggest single separator in this matchup is SimpleQA, where the scores are 91% and 21.7%.
Claude Sonnet 4.5 has the edge for knowledge tasks in this comparison, averaging 87.2 versus 74.1. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Claude Sonnet 4.5 has the edge for coding in this comparison, averaging 82.1 versus 41.5. Grok 3 Mini stays close enough that the answer can still flip depending on your workload.
Claude Sonnet 4.5 has the edge for math in this comparison, averaging 96 versus 39.7. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.
Claude Sonnet 4.5 has the edge for reasoning in this comparison, averaging 89.9 versus 21.7. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
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