Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Opus 4.5
80
Grok Code Fast 1
42
Verified leaderboard positions: Claude Opus 4.5 #7 · Grok Code Fast 1 unranked
Pick Claude Opus 4.5 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you need the larger 256K context window.
Coding
+4.9 difference
Claude Opus 4.5
Grok Code Fast 1
$null / $null
$null / $null
46 t/s
172 t/s
1.01s
2.81s
200K
256K
Pick Claude Opus 4.5 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you need the larger 256K context window.
Claude Opus 4.5 is clearly ahead on the provisional aggregate, 80 to 42. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok Code Fast 1 gives you the larger context window at 256K, compared with 200K for Claude Opus 4.5.
Claude Opus 4.5 is ahead on BenchLM's provisional leaderboard, 80 to 42. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 80.9% and 70.8%.
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 65.9. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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