Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Mercury 2 is clearly ahead on the aggregate, 65 to 52. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Mercury 2's sharpest advantage is in coding, where it averages 41.1 against 18.5. The single biggest benchmark swing on the page is SWE-bench Verified, 46 to 5. Gemini 1.5 Pro does hit back in multimodal & grounded, so the answer changes if that is the part of the workload you care about most.
Mercury 2 is the reasoning model in the pair, while Gemini 1.5 Pro is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Gemini 1.5 Pro gives you the larger context window at 2M, compared with 128K for Mercury 2.
Pick Mercury 2 if you want the stronger benchmark profile. Gemini 1.5 Pro only becomes the better choice if multimodal & grounded is the priority or you need the larger 2M context window.
Mercury 2
63.7
Gemini 1.5 Pro
49.8
Mercury 2
41.1
Gemini 1.5 Pro
18.5
Mercury 2
68.3
Gemini 1.5 Pro
74.1
Mercury 2
80.1
Gemini 1.5 Pro
66.9
Mercury 2
57.2
Gemini 1.5 Pro
44.2
Mercury 2
84
Gemini 1.5 Pro
77
Mercury 2
79.7
Gemini 1.5 Pro
69.5
Mercury 2
80.9
Gemini 1.5 Pro
67.5
Mercury 2 is ahead overall, 65 to 52. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 46 and 5.
Mercury 2 has the edge for knowledge tasks in this comparison, averaging 57.2 versus 44.2. Inside this category, MMLU-Pro is the benchmark that creates the most daylight between them.
Mercury 2 has the edge for coding in this comparison, averaging 41.1 versus 18.5. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Mercury 2 has the edge for math in this comparison, averaging 80.9 versus 67.5. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Mercury 2 has the edge for reasoning in this comparison, averaging 80.1 versus 66.9. Inside this category, MuSR is the benchmark that creates the most daylight between them.
Mercury 2 has the edge for agentic tasks in this comparison, averaging 63.7 versus 49.8. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Gemini 1.5 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 74.1 versus 68.3. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Mercury 2 has the edge for instruction following in this comparison, averaging 84 versus 77. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Mercury 2 has the edge for multilingual tasks in this comparison, averaging 79.7 versus 69.5. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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