Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Opus 4.5
80
Gemini 2.5 Pro
66
Verified leaderboard positions: Claude Opus 4.5 #7 · Gemini 2.5 Pro unranked
Pick Claude Opus 4.5 if you want the stronger benchmark profile. Gemini 2.5 Pro only becomes the better choice if you need the larger 1M context window.
Coding
+2.1 difference
Knowledge
+25.4 difference
Claude Opus 4.5
Gemini 2.5 Pro
$null / $null
$1.25 / $5
46 t/s
117 t/s
1.01s
21.19s
200K
1M
Pick Claude Opus 4.5 if you want the stronger benchmark profile. Gemini 2.5 Pro only becomes the better choice if you need the larger 1M context window.
Claude Opus 4.5 is clearly ahead on the provisional aggregate, 80 to 66. 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 knowledge, where it averages 66.2 against 40.8. The single biggest benchmark swing on the page is SWE-bench Verified, 80.9% to 63.8%.
Gemini 2.5 Pro gives you the larger context window at 1M, compared with 200K for Claude Opus 4.5.
Claude Opus 4.5 is ahead on BenchLM's provisional leaderboard, 80 to 66. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 80.9% and 63.8%.
Claude Opus 4.5 has the edge for knowledge tasks in this comparison, averaging 66.2 versus 40.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Claude Opus 4.5 has the edge for coding in this comparison, averaging 65.9 versus 63.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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