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 agentic, where it averages 62.3 against 57.9. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 63 to 56. Claude 4 Sonnet does hit back in coding, 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 Sonnet 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 Sonnet.
Pick Seed 1.6 if you want the stronger benchmark profile. Claude 4 Sonnet only becomes the better choice if coding 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 Sonnet
57.9
Seed 1.6
42.4
Claude 4 Sonnet
42.9
Seed 1.6
79.6
Claude 4 Sonnet
79.7
Seed 1.6
74.5
Claude 4 Sonnet
71.8
Seed 1.6
56.4
Claude 4 Sonnet
56.8
Seed 1.6
87
Claude 4 Sonnet
83
Seed 1.6
83.4
Claude 4 Sonnet
82.1
Seed 1.6
75.9
Claude 4 Sonnet
76.1
Seed 1.6 is ahead overall, 65 to 64. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 63 and 56.
Claude 4 Sonnet has the edge for knowledge tasks in this comparison, averaging 56.8 versus 56.4. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for coding in this comparison, averaging 42.9 versus 42.4. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for math in this comparison, averaging 76.1 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 71.8. Inside this category, LongBench v2 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 57.9. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Claude 4 Sonnet has the edge for multimodal and grounded tasks in this comparison, averaging 79.7 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 82.1. 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.