GPT-5.1 vs Qwen3.5 397B

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

Quick Verdict

GPT-5.1 wins overall with a score of 76 vs 65 (11 point difference).GPT-5.1 wins 4 out of 4 categories.

Knowledge

GPT-5.1

GPT-5.1

94

Qwen3.5 397B

80.8

97
MMLU
83
95
GPQA
82
93
SuperGPQA
80
91
OpenBookQA
78

Coding

GPT-5.1

GPT-5.1

89

Qwen3.5 397B

75

89
HumanEval
75

Mathematics

GPT-5.1

GPT-5.1

97.1

Qwen3.5 397B

82

99
AIME 2023
83
99
AIME 2024
85
98
AIME 2025
84
95
HMMT Feb 2023
79
97
HMMT Feb 2024
81
96
HMMT Feb 2025
80
96
BRUMO 2025
82

Reasoning

GPT-5.1

GPT-5.1

92

Qwen3.5 397B

79

93
SimpleQA
80
91
MuSR
78

Frequently Asked Questions

Which is better, GPT-5.1 or Qwen3.5 397B?

GPT-5.1 scores higher overall with 76 vs 65, a difference of 11 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.1 or Qwen3.5 397B?

GPT-5.1 leads in knowledge tasks with an average score of 94 vs 80.8.

Which is better for coding, GPT-5.1 or Qwen3.5 397B?

GPT-5.1 leads in coding with an average score of 89 vs 75.

Which is better for math, GPT-5.1 or Qwen3.5 397B?

GPT-5.1 leads in math with an average score of 97.1 vs 82.

Which is better for reasoning, GPT-5.1 or Qwen3.5 397B?

GPT-5.1 leads in reasoning with an average score of 92 vs 79.