benchlm.ai

Gemini 3.1 Flash-Lite vs GPT-5.1-Codex-Max

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

Quick Verdict

GPT-5.1-Codex-Max wins overall with a score of 77 vs 53 (24 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

Gemini 3.1 Flash-Lite

CreatorGoogle
TypeProprietary
Context1M
Score53

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

Gemini 3.1 Flash-Lite

60.8

GPT-5.1-Codex-Max

95

63
MMLU
98
62
GPQA
96
60
SuperGPQA
94
58
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

Gemini 3.1 Flash-Lite

55

GPT-5.1-Codex-Max

94

55
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

Gemini 3.1 Flash-Lite

62

GPT-5.1-Codex-Max

97.1

63
AIME 2023
99
65
AIME 2024
99
64
AIME 2025
98
59
HMMT Feb 2023
95
61
HMMT Feb 2024
97
60
HMMT Feb 2025
96
62
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

Gemini 3.1 Flash-Lite

59

GPT-5.1-Codex-Max

93

60
SimpleQA
94
58
MuSR
92

Frequently Asked Questions

Which is better, Gemini 3.1 Flash-Lite or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 53, a difference of 24 points across all benchmarks.

Which is better for knowledge tasks, Gemini 3.1 Flash-Lite or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 60.8.

Which is better for coding, Gemini 3.1 Flash-Lite or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 55.

Which is better for math, Gemini 3.1 Flash-Lite or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 62.

Which is better for reasoning, Gemini 3.1 Flash-Lite or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 59.

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