Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Seed 1.6 Flash is clearly ahead on the aggregate, 56 to 44. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Seed 1.6 Flash's sharpest advantage is in mathematics, where it averages 67.1 against 48.3. The single biggest benchmark swing on the page is HumanEval, 59 to 30.
Seed 1.6 Flash gives you the larger context window at 256K, compared with 200K for Claude 4.1 Opus Thinking.
Pick Seed 1.6 Flash if you want the stronger benchmark profile. Claude 4.1 Opus Thinking only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Seed 1.6 Flash
54.5
Claude 4.1 Opus Thinking
46.7
Seed 1.6 Flash
27.6
Claude 4.1 Opus Thinking
21.8
Seed 1.6 Flash
73.1
Claude 4.1 Opus Thinking
59.3
Seed 1.6 Flash
66.8
Claude 4.1 Opus Thinking
49.4
Seed 1.6 Flash
47.3
Claude 4.1 Opus Thinking
34.3
Seed 1.6 Flash
81
Claude 4.1 Opus Thinking
66
Seed 1.6 Flash
72.8
Claude 4.1 Opus Thinking
58.7
Seed 1.6 Flash
67.1
Claude 4.1 Opus Thinking
48.3
Seed 1.6 Flash is ahead overall, 56 to 44. The biggest single separator in this matchup is HumanEval, where the scores are 59 and 30.
Seed 1.6 Flash has the edge for knowledge tasks in this comparison, averaging 47.3 versus 34.3. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for coding in this comparison, averaging 27.6 versus 21.8. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for math in this comparison, averaging 67.1 versus 48.3. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for reasoning in this comparison, averaging 66.8 versus 49.4. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for agentic tasks in this comparison, averaging 54.5 versus 46.7. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for multimodal and grounded tasks in this comparison, averaging 73.1 versus 59.3. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for instruction following in this comparison, averaging 81 versus 66. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for multilingual tasks in this comparison, averaging 72.8 versus 58.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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