Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Claude Opus 4.5 is clearly ahead on the aggregate, 85 to 43. 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 mathematics, where it averages 96.1 against 26.4. The single biggest benchmark swing on the page is AIME 2024, 99 to 26.4.
GPT-4.1 gives you the larger context window at 1M, compared with 200K for Claude Opus 4.5.
Pick Claude Opus 4.5 if you want the stronger benchmark profile. GPT-4.1 only becomes the better choice if you need the larger 1M context window.
Claude Opus 4.5
80.8
GPT-4.1
78.3
Claude Opus 4.5
72
GPT-4.1
54.6
Claude Opus 4.5
96.1
GPT-4.1
26.4
Claude Opus 4.5
90
GPT-4.1
87.4
Claude Opus 4.5 is ahead overall, 85 to 43. The biggest single separator in this matchup is AIME 2024, where the scores are 99 and 26.4.
Claude Opus 4.5 has the edge for knowledge tasks in this comparison, averaging 80.8 versus 78.3. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Claude Opus 4.5 has the edge for coding in this comparison, averaging 72 versus 54.6. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Claude Opus 4.5 has the edge for math in this comparison, averaging 96.1 versus 26.4. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.
Claude Opus 4.5 has the edge for instruction following in this comparison, averaging 90 versus 87.4. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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