benchlm.ai

GPT-5.3 Codex vs Qwen3 235B 2507

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 30 (55 point difference).GPT-5.3 Codex wins 4 out of 4 categories.

GPT-5.3 Codex

CreatorOpenAI
TypeProprietary
Context400K
Score85

Qwen3 235B 2507

CreatorAlibaba
TypeOpen Weight
Context128K
Score30

Knowledge

GPT-5.3 Codex

GPT-5.3 Codex

96

Qwen3 235B 2507

36.8

99
MMLU
39
97
GPQA
38
95
SuperGPQA
36
93
OpenBookQA
34

Coding

GPT-5.3 Codex

GPT-5.3 Codex

95

Qwen3 235B 2507

31

95
HumanEval
31

Mathematics

GPT-5.3 Codex

GPT-5.3 Codex

97.1

Qwen3 235B 2507

38

99
AIME 2023
39
99
AIME 2024
41
98
AIME 2025
40
95
HMMT Feb 2023
35
97
HMMT Feb 2024
37
96
HMMT Feb 2025
36
96
BRUMO 2025
38

Reasoning

GPT-5.3 Codex

GPT-5.3 Codex

94

Qwen3 235B 2507

36

95
SimpleQA
37
93
MuSR
35

Frequently Asked Questions

Which is better, GPT-5.3 Codex or Qwen3 235B 2507?

GPT-5.3 Codex scores higher overall with 85 vs 30, a difference of 55 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.3 Codex or Qwen3 235B 2507?

GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 36.8.

Which is better for coding, GPT-5.3 Codex or Qwen3 235B 2507?

GPT-5.3 Codex leads in coding with an average score of 95 vs 31.

Which is better for math, GPT-5.3 Codex or Qwen3 235B 2507?

GPT-5.3 Codex leads in math with an average score of 97.1 vs 38.

Which is better for reasoning, GPT-5.3 Codex or Qwen3 235B 2507?

GPT-5.3 Codex leads in reasoning with an average score of 94 vs 36.

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