Grok 4.1 Fast vs Qwen3.5 397B (Reasoning)

Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.

Quick Verdict

Grok 4.1 Fast wins overall with a score of 73 vs 70 (3 point difference).Grok 4.1 Fast wins 4 out of 4 categories.

Knowledge

Grok 4.1 Fast

Grok 4.1 Fast

91

Qwen3.5 397B (Reasoning)

88

94
MMLU
91
92
GPQA
89
90
SuperGPQA
87
88
OpenBookQA
85

Coding

Grok 4.1 Fast

Grok 4.1 Fast

86

Qwen3.5 397B (Reasoning)

83

86
HumanEval
83

Mathematics

Grok 4.1 Fast

Grok 4.1 Fast

95

Qwen3.5 397B (Reasoning)

92

96
AIME 2023
93
98
AIME 2024
95
97
AIME 2025
94
92
HMMT Feb 2023
89
94
HMMT Feb 2024
91
93
HMMT Feb 2025
90
95
BRUMO 2025
92

Reasoning

Grok 4.1 Fast

Grok 4.1 Fast

89

Qwen3.5 397B (Reasoning)

86

90
SimpleQA
87
88
MuSR
85

Frequently Asked Questions

Which is better, Grok 4.1 Fast or Qwen3.5 397B (Reasoning)?

Grok 4.1 Fast scores higher overall with 73 vs 70, a difference of 3 points across all benchmarks.

Which is better for knowledge tasks, Grok 4.1 Fast or Qwen3.5 397B (Reasoning)?

Grok 4.1 Fast leads in knowledge tasks with an average score of 91 vs 88.

Which is better for coding, Grok 4.1 Fast or Qwen3.5 397B (Reasoning)?

Grok 4.1 Fast leads in coding with an average score of 86 vs 83.

Which is better for math, Grok 4.1 Fast or Qwen3.5 397B (Reasoning)?

Grok 4.1 Fast leads in math with an average score of 95 vs 92.

Which is better for reasoning, Grok 4.1 Fast or Qwen3.5 397B (Reasoning)?

Grok 4.1 Fast leads in reasoning with an average score of 89 vs 86.