Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Claude Opus 4.5 is clearly ahead on the aggregate, 63 to 23. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Opus 4.5's sharpest advantage is in reasoning, where it averages 93.9 against 21.7. The single biggest benchmark swing on the page is SimpleQA, 95% to 21.7%.
Claude Opus 4.5 gives you the larger context window at 200K, compared with 128K for Grok 3 Mini.
Pick Claude Opus 4.5 if you want the stronger benchmark profile. Grok 3 Mini only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Comparable scores for this category are coming soon. One or both models do not have sourced results here yet.
Claude Opus 4.5
86
Grok 3 Mini
41.5
Benchmark data for this category is coming soon.
Claude Opus 4.5
93.9
Grok 3 Mini
21.7
Claude Opus 4.5
91
Grok 3 Mini
74.1
Benchmark data for this category is coming soon.
Benchmark data for this category is coming soon.
Claude Opus 4.5
96
Grok 3 Mini
39.7
Claude Opus 4.5 is ahead overall, 63 to 23. The biggest single separator in this matchup is SimpleQA, where the scores are 95% and 21.7%.
Claude Opus 4.5 has the edge for knowledge tasks in this comparison, averaging 91 versus 74.1. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Claude Opus 4.5 has the edge for coding in this comparison, averaging 86 versus 41.5. Grok 3 Mini stays close enough that the answer can still flip depending on your workload.
Claude Opus 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 Opus 4.5 has the edge for reasoning in this comparison, averaging 93.9 versus 21.7. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
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