Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Seed 1.6 finishes one point ahead overall, 65 to 64. That is enough to call, but not enough to treat as a blowout. This matchup comes down to a few meaningful edges rather than one model dominating the board.
Seed 1.6's sharpest advantage is in instruction following, where it averages 87 against 83. The single biggest benchmark swing on the page is MRCRv2, 78 to 71. Claude 4.1 Opus does hit back in mathematics, so the answer changes if that is the part of the workload you care about most.
Seed 1.6 is the reasoning model in the pair, while Claude 4.1 Opus 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. Seed 1.6 gives you the larger context window at 256K, compared with 200K for Claude 4.1 Opus.
Pick Seed 1.6 if you want the stronger benchmark profile. Claude 4.1 Opus only becomes the better choice if mathematics is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
Seed 1.6
62.3
Claude 4.1 Opus
58.7
Seed 1.6
42.4
Claude 4.1 Opus
44
Seed 1.6
79.6
Claude 4.1 Opus
80.7
Seed 1.6
74.5
Claude 4.1 Opus
72.9
Seed 1.6
56.4
Claude 4.1 Opus
57.6
Seed 1.6
87
Claude 4.1 Opus
83
Seed 1.6
83.4
Claude 4.1 Opus
81.8
Seed 1.6
75.9
Claude 4.1 Opus
77.7
Seed 1.6 is ahead overall, 65 to 64. The biggest single separator in this matchup is MRCRv2, where the scores are 78 and 71.
Claude 4.1 Opus has the edge for knowledge tasks in this comparison, averaging 57.6 versus 56.4. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Claude 4.1 Opus has the edge for coding in this comparison, averaging 44 versus 42.4. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Claude 4.1 Opus has the edge for math in this comparison, averaging 77.7 versus 75.9. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for reasoning in this comparison, averaging 74.5 versus 72.9. Inside this category, MRCRv2 is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for agentic tasks in this comparison, averaging 62.3 versus 58.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Claude 4.1 Opus has the edge for multimodal and grounded tasks in this comparison, averaging 80.7 versus 79.6. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for instruction following in this comparison, averaging 87 versus 83. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for multilingual tasks in this comparison, averaging 83.4 versus 81.8. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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