Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Sonnet 4.5
68
Grok Code Fast 1
42
Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if you need the larger 256K context window.
Coding
+6.4 difference
Claude Sonnet 4.5
Grok Code Fast 1
$3 / $15
$null / $null
N/A
172 t/s
N/A
2.81s
200K
256K
Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if you need the larger 256K context window.
Claude Sonnet 4.5 is clearly ahead on the provisional aggregate, 68 to 42. 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 coding, where it averages 77.2 against 70.8. The single biggest benchmark swing on the page is SWE-bench Verified, 77.2% to 70.8%.
Grok Code Fast 1 gives you the larger context window at 256K, compared with 200K for Claude Sonnet 4.5.
Claude Sonnet 4.5 is ahead on BenchLM's provisional leaderboard, 68 to 42. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 77.2% and 70.8%.
Claude Sonnet 4.5 has the edge for coding in this comparison, averaging 77.2 versus 70.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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