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 25. 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 24.9. The single biggest benchmark swing on the page is SimpleQA, 91% to 24.9%.
Claude Sonnet 4.5 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $0.27 input / $1.10 output per 1M tokens for DeepSeek V3. That is roughly 13.6x on output cost alone. Claude Sonnet 4.5 gives you the larger context window at 200K, compared with 128K for DeepSeek V3.
Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. DeepSeek V3 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
DeepSeek V3
42
Benchmark data for this category is coming soon.
Claude Sonnet 4.5
89.9
DeepSeek V3
24.9
Claude Sonnet 4.5
87.2
DeepSeek V3
69.6
Benchmark data for this category is coming soon.
Benchmark data for this category is coming soon.
Claude Sonnet 4.5
96
DeepSeek V3
90.2
Claude Sonnet 4.5 is ahead overall, 59 to 25. The biggest single separator in this matchup is SimpleQA, where the scores are 91% and 24.9%.
Claude Sonnet 4.5 has the edge for knowledge tasks in this comparison, averaging 87.2 versus 69.6. 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 42. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Claude Sonnet 4.5 has the edge for math in this comparison, averaging 96 versus 90.2. 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 24.9. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
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