benchlm.ai

GPT-5.3 Codex vs Llama 4 Scout

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 38 (47 point difference).GPT-5.3 Codex wins 4 out of 4 categories.

GPT-5.3 Codex

CreatorOpenAI
TypeProprietary
Context400K
Score85

Llama 4 Scout

CreatorMeta
TypeOpen Weight
Context32K
Score38

Knowledge

GPT-5.3 Codex

GPT-5.3 Codex

96

Llama 4 Scout

44.8

99
MMLU
47
97
GPQA
46
95
SuperGPQA
44
93
OpenBookQA
42

Coding

GPT-5.3 Codex

GPT-5.3 Codex

95

Llama 4 Scout

39

95
HumanEval
39

Mathematics

GPT-5.3 Codex

GPT-5.3 Codex

97.1

Llama 4 Scout

46

99
AIME 2023
47
99
AIME 2024
49
98
AIME 2025
48
95
HMMT Feb 2023
43
97
HMMT Feb 2024
45
96
HMMT Feb 2025
44
96
BRUMO 2025
46

Reasoning

GPT-5.3 Codex

GPT-5.3 Codex

94

Llama 4 Scout

44

95
SimpleQA
45
93
MuSR
43

Frequently Asked Questions

Which is better, GPT-5.3 Codex or Llama 4 Scout?

GPT-5.3 Codex scores higher overall with 85 vs 38, a difference of 47 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.3 Codex or Llama 4 Scout?

GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 44.8.

Which is better for coding, GPT-5.3 Codex or Llama 4 Scout?

GPT-5.3 Codex leads in coding with an average score of 95 vs 39.

Which is better for math, GPT-5.3 Codex or Llama 4 Scout?

GPT-5.3 Codex leads in math with an average score of 97.1 vs 46.

Which is better for reasoning, GPT-5.3 Codex or Llama 4 Scout?

GPT-5.3 Codex leads in reasoning with an average score of 94 vs 44.

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