Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Seed 1.6 is clearly ahead on the aggregate, 65 to 48. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Seed 1.6's sharpest advantage is in multimodal & grounded, where it averages 79.6 against 48.8. The single biggest benchmark swing on the page is MMMU-Pro, 80 to 42.
Seed 1.6 is the reasoning model in the pair, while GPT-OSS 120B 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 128K for GPT-OSS 120B.
Pick Seed 1.6 if you want the stronger benchmark profile. GPT-OSS 120B only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Seed 1.6
62.3
GPT-OSS 120B
44.8
Seed 1.6
42.4
GPT-OSS 120B
28.1
Seed 1.6
79.6
GPT-OSS 120B
48.8
Seed 1.6
74.5
GPT-OSS 120B
55.2
Seed 1.6
56.4
GPT-OSS 120B
41.5
Seed 1.6
87
GPT-OSS 120B
79
Seed 1.6
83.4
GPT-OSS 120B
70.7
Seed 1.6
75.9
GPT-OSS 120B
59.5
Seed 1.6 is ahead overall, 65 to 48. The biggest single separator in this matchup is MMMU-Pro, where the scores are 80 and 42.
Seed 1.6 has the edge for knowledge tasks in this comparison, averaging 56.4 versus 41.5. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for coding in this comparison, averaging 42.4 versus 28.1. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for math in this comparison, averaging 75.9 versus 59.5. 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 55.2. Inside this category, MuSR 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 44.8. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Seed 1.6 has the edge for multimodal and grounded tasks in this comparison, averaging 79.6 versus 48.8. 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 79. 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 70.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.
Get notified when new models drop, benchmark scores change, or the leaderboard shifts. One email per week.
Free. No spam. Unsubscribe anytime. We only store derived location metadata for consent routing.