benchlm.ai

GPT-5.3 Codex vs Qwen2.5-1M

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 66 (19 point difference).GPT-5.3 Codex wins 4 out of 4 categories.

GPT-5.3 Codex

CreatorOpenAI
TypeProprietary
Context400K
Score85

Qwen2.5-1M

CreatorAlibaba
TypeOpen Weight
Context1M
Score66

Knowledge

GPT-5.3 Codex

GPT-5.3 Codex

96

Qwen2.5-1M

81.8

99
MMLU
84
97
GPQA
83
95
SuperGPQA
81
93
OpenBookQA
79

Coding

GPT-5.3 Codex

GPT-5.3 Codex

95

Qwen2.5-1M

76

95
HumanEval
76

Mathematics

GPT-5.3 Codex

GPT-5.3 Codex

97.1

Qwen2.5-1M

84

99
AIME 2023
85
99
AIME 2024
87
98
AIME 2025
86
95
HMMT Feb 2023
81
97
HMMT Feb 2024
83
96
HMMT Feb 2025
82
96
BRUMO 2025
84

Reasoning

GPT-5.3 Codex

GPT-5.3 Codex

94

Qwen2.5-1M

80

95
SimpleQA
81
93
MuSR
79

Frequently Asked Questions

Which is better, GPT-5.3 Codex or Qwen2.5-1M?

GPT-5.3 Codex scores higher overall with 85 vs 66, a difference of 19 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.3 Codex or Qwen2.5-1M?

GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 81.8.

Which is better for coding, GPT-5.3 Codex or Qwen2.5-1M?

GPT-5.3 Codex leads in coding with an average score of 95 vs 76.

Which is better for math, GPT-5.3 Codex or Qwen2.5-1M?

GPT-5.3 Codex leads in math with an average score of 97.1 vs 84.

Which is better for reasoning, GPT-5.3 Codex or Qwen2.5-1M?

GPT-5.3 Codex leads in reasoning with an average score of 94 vs 80.

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