Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Sonnet 5
94
Grok 4.3
72
Pick Claude Sonnet 5 if you want the stronger benchmark profile. Grok 4.3 only becomes the better choice if you want the cheaper token bill.
Coding
+15.9 difference
Knowledge
+3.5 difference
Claude Sonnet 5
Grok 4.3
$3 / $15
$1.25 / $2.5
N/A
209 t/s
N/A
12.36s
1M
1M
Pick Claude Sonnet 5 if you want the stronger benchmark profile. Grok 4.3 only becomes the better choice if you want the cheaper token bill.
Claude Sonnet 5 is clearly ahead on the provisional aggregate, 94 to 72. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Sonnet 5's sharpest advantage is in coding, where it averages 63.2 against 47.3. The single biggest benchmark swing on the page is HLE, 57.4% to 35%.
Claude Sonnet 5 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $1.25 input / $2.50 output per 1M tokens for Grok 4.3. That is roughly 6.0x on output cost alone.
Claude Sonnet 5 is ahead on BenchLM's provisional leaderboard, 94 to 72. The biggest single separator in this matchup is HLE, where the scores are 57.4% and 35%.
Claude Sonnet 5 has the edge for knowledge tasks in this comparison, averaging 57.4 versus 53.9. Inside this category, HLE is the benchmark that creates the most daylight between them.
Claude Sonnet 5 has the edge for coding in this comparison, averaging 63.2 versus 47.3. Grok 4.3 stays close enough that the answer can still flip depending on your workload.
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