Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Sonnet 5
94
GPT-5.4 mini
68
Pick Claude Sonnet 5 if you want the stronger benchmark profile. GPT-5.4 mini only becomes the better choice if you want the cheaper token bill.
Agentic
+16.2 difference
Knowledge
Claude Sonnet 5
GPT-5.4 mini
$3 / $15
$0.75 / $4.5
N/A
201 t/s
N/A
3.85s
1M
400K
Pick Claude Sonnet 5 if you want the stronger benchmark profile. GPT-5.4 mini only becomes the better choice if you want the cheaper token bill.
Claude Sonnet 5 is clearly ahead on the provisional aggregate, 94 to 68. 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 agentic, where it averages 81.8 against 65.6. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 80.4% to 60%.
Claude Sonnet 5 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $0.75 input / $4.50 output per 1M tokens for GPT-5.4 mini. That is roughly 3.3x on output cost alone. Claude Sonnet 5 gives you the larger context window at 1M, compared with 400K for GPT-5.4 mini.
Claude Sonnet 5 is ahead on BenchLM's provisional leaderboard, 94 to 68. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 80.4% and 60%.
Claude Sonnet 5 and GPT-5.4 mini are effectively tied for knowledge tasks here, both landing at 57.4 on average.
Claude Sonnet 5 has the edge for agentic tasks in this comparison, averaging 81.8 versus 65.6. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
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