Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Seed 1.6 Flash has the cleaner overall profile here, landing at 56 versus 54. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Seed 1.6 Flash's sharpest advantage is in multimodal & grounded, where it averages 73.1 against 50.4. The single biggest benchmark swing on the page is MMMU-Pro, 74 to 40. Grok Code Fast 1 does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Seed 1.6 Flash is the reasoning model in the pair, while Grok Code Fast 1 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.
Pick Seed 1.6 Flash if you want the stronger benchmark profile. Grok Code Fast 1 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 Flash
54.5
Grok Code Fast 1
55.7
Seed 1.6 Flash
27.6
Grok Code Fast 1
32.8
Seed 1.6 Flash
73.1
Grok Code Fast 1
50.4
Seed 1.6 Flash
66.8
Grok Code Fast 1
63.7
Seed 1.6 Flash
47.3
Grok Code Fast 1
48
Seed 1.6 Flash
81
Grok Code Fast 1
79
Seed 1.6 Flash
72.8
Grok Code Fast 1
73.7
Seed 1.6 Flash
67.1
Grok Code Fast 1
67.5
Seed 1.6 Flash is ahead overall, 56 to 54. The biggest single separator in this matchup is MMMU-Pro, where the scores are 74 and 40.
Grok Code Fast 1 has the edge for knowledge tasks in this comparison, averaging 48 versus 47.3. Inside this category, HLE is the benchmark that creates the most daylight between them.
Grok Code Fast 1 has the edge for coding in this comparison, averaging 32.8 versus 27.6. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
Grok Code Fast 1 has the edge for math in this comparison, averaging 67.5 versus 67.1. Inside this category, MATH-500 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 63.7. Inside this category, MRCRv2 is the benchmark that creates the most daylight between them.
Grok Code Fast 1 has the edge for agentic tasks in this comparison, averaging 55.7 versus 54.5. Inside this category, Terminal-Bench 2.0 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 50.4. Inside this category, MMMU-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 79. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Grok Code Fast 1 has the edge for multilingual tasks in this comparison, averaging 73.7 versus 72.8. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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