benchlm.ai

Claude Opus 4.5 vs GPT-5.4

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

Quick Verdict

GPT-5.4 wins overall with a score of 88 vs 79 (9 point difference).GPT-5.4 wins 0 out of 4 categories.

Claude Opus 4.5

CreatorAnthropic
TypeProprietary
Context200K
Score79

GPT-5.4

CreatorOpenAI
TypeProprietary
Context1M
Score88

Knowledge

Tie

Claude Opus 4.5

96

GPT-5.4

96

99
MMLU
99
97
GPQA
97
95
SuperGPQA
95
93
OpenBookQA
93

Coding

Tie

Claude Opus 4.5

91

GPT-5.4

91

91
HumanEval
91

Mathematics

Tie

Claude Opus 4.5

97.1

GPT-5.4

97.1

99
AIME 2023
99
99
AIME 2024
99
98
AIME 2025
98
95
HMMT Feb 2023
95
97
HMMT Feb 2024
97
96
HMMT Feb 2025
96
96
BRUMO 2025
96

Reasoning

Tie

Claude Opus 4.5

94

GPT-5.4

94

95
SimpleQA
95
93
MuSR
93

Frequently Asked Questions

Which is better, Claude Opus 4.5 or GPT-5.4?

GPT-5.4 scores higher overall with 88 vs 79, a difference of 9 points across all benchmarks.

Which is better for knowledge tasks, Claude Opus 4.5 or GPT-5.4?

Claude Opus 4.5 and GPT-5.4 are tied for knowledge tasks with average scores of 96.

Which is better for coding, Claude Opus 4.5 or GPT-5.4?

Claude Opus 4.5 and GPT-5.4 are tied for coding with average scores of 91.

Which is better for math, Claude Opus 4.5 or GPT-5.4?

Claude Opus 4.5 and GPT-5.4 are tied for math with average scores of 97.1.

Which is better for reasoning, Claude Opus 4.5 or GPT-5.4?

Claude Opus 4.5 and GPT-5.4 are tied for reasoning with average scores of 94.

Related Comparisons

Claude Opus 4.5 vs Gemini 3.1 ProClaude Opus 4.5 vs Claude Opus 4.6Claude Opus 4.5 vs GPT-5.3 CodexClaude Opus 4.5 vs Grok 4.1Claude Opus 4.5 vs GPT-5.2Claude Opus 4.5 vs GPT-5.2-Codex