benchlm.ai

GPT-5.3 Codex vs Mistral 8x7B v0.2

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

Quick Verdict

GPT-5.3 Codex wins overall with a score of 85 vs 20 (65 point difference).GPT-5.3 Codex wins 4 out of 4 categories.

GPT-5.3 Codex

CreatorOpenAI
TypeProprietary
Context400K
Score85

Mistral 8x7B v0.2

CreatorMistral
TypeOpen Weight
Context32K
Score20

Knowledge

GPT-5.3 Codex

GPT-5.3 Codex

96

Mistral 8x7B v0.2

26.8

99
MMLU
29
97
GPQA
28
95
SuperGPQA
26
93
OpenBookQA
24

Coding

GPT-5.3 Codex

GPT-5.3 Codex

95

Mistral 8x7B v0.2

21

95
HumanEval
21

Mathematics

GPT-5.3 Codex

GPT-5.3 Codex

97.1

Mistral 8x7B v0.2

28

99
AIME 2023
29
99
AIME 2024
31
98
AIME 2025
30
95
HMMT Feb 2023
25
97
HMMT Feb 2024
27
96
HMMT Feb 2025
26
96
BRUMO 2025
28

Reasoning

GPT-5.3 Codex

GPT-5.3 Codex

94

Mistral 8x7B v0.2

26

95
SimpleQA
27
93
MuSR
25

Frequently Asked Questions

Which is better, GPT-5.3 Codex or Mistral 8x7B v0.2?

GPT-5.3 Codex scores higher overall with 85 vs 20, a difference of 65 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.3 Codex or Mistral 8x7B v0.2?

GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 26.8.

Which is better for coding, GPT-5.3 Codex or Mistral 8x7B v0.2?

GPT-5.3 Codex leads in coding with an average score of 95 vs 21.

Which is better for math, GPT-5.3 Codex or Mistral 8x7B v0.2?

GPT-5.3 Codex leads in math with an average score of 97.1 vs 28.

Which is better for reasoning, GPT-5.3 Codex or Mistral 8x7B v0.2?

GPT-5.3 Codex leads in reasoning with an average score of 94 vs 26.

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