Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Sonnet 5
94
GPT-5.4
87
Verified leaderboard positions: Claude Sonnet 5 unranked · GPT-5.4 #19
Pick Claude Sonnet 5 if you want the stronger benchmark profile. GPT-5.4 only becomes the better choice if knowledge is the priority or you need the larger 1.05M context window.
Agentic
+4.8 difference
Coding
+5.5 difference
Knowledge
+8.7 difference
Claude Sonnet 5
GPT-5.4
$3 / $15
$2.5 / $15
N/A
74 t/s
N/A
151.79s
1M
1.05M
Pick Claude Sonnet 5 if you want the stronger benchmark profile. GPT-5.4 only becomes the better choice if knowledge is the priority or you need the larger 1.05M context window.
Claude Sonnet 5 is clearly ahead on the provisional aggregate, 94 to 87. 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 57.7. The single biggest benchmark swing on the page is OSWorld-Verified, 81.2% to 75%. GPT-5.4 does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 gives you the larger context window at 1.05M, compared with 1M for Claude Sonnet 5.
Claude Sonnet 5 is ahead on BenchLM's provisional leaderboard, 94 to 87. The biggest single separator in this matchup is OSWorld-Verified, where the scores are 81.2% and 75%.
GPT-5.4 has the edge for knowledge tasks in this comparison, averaging 66.1 versus 57.4. 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 57.7. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
Claude Sonnet 5 has the edge for agentic tasks in this comparison, averaging 81.8 versus 77. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
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