GPT-4 Turbo vs GPT-5.1

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

Quick Verdict

GPT-5.1 wins overall with a score of 76 vs 50 (26 point difference).GPT-5.1 wins 4 out of 4 categories.

Knowledge

GPT-5.1

GPT-4 Turbo

58.5

GPT-5.1

94

60
MMLU
97
60
GPQA
95
58
SuperGPQA
93
56
OpenBookQA
91

Coding

GPT-5.1

GPT-4 Turbo

52

GPT-5.1

89

52
HumanEval
89

Mathematics

GPT-5.1

GPT-4 Turbo

59

GPT-5.1

97.1

60
AIME 2023
99
62
AIME 2024
99
61
AIME 2025
98
56
HMMT Feb 2023
95
58
HMMT Feb 2024
97
57
HMMT Feb 2025
96
59
BRUMO 2025
96

Reasoning

GPT-5.1

GPT-4 Turbo

57

GPT-5.1

92

58
SimpleQA
93
56
MuSR
91

Frequently Asked Questions

Which is better, GPT-4 Turbo or GPT-5.1?

GPT-5.1 scores higher overall with 76 vs 50, a difference of 26 points across all benchmarks.

Which is better for knowledge tasks, GPT-4 Turbo or GPT-5.1?

GPT-5.1 leads in knowledge tasks with an average score of 94 vs 58.5.

Which is better for coding, GPT-4 Turbo or GPT-5.1?

GPT-5.1 leads in coding with an average score of 89 vs 52.

Which is better for math, GPT-4 Turbo or GPT-5.1?

GPT-5.1 leads in math with an average score of 97.1 vs 59.

Which is better for reasoning, GPT-4 Turbo or GPT-5.1?

GPT-5.1 leads in reasoning with an average score of 92 vs 57.