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Claude Opus 5 vs GPT-5.4

GPT-5.4 leads in 5 of 8 categories

Arena ELO

GPT-5.4

Cheaper

GPT-5.4

Faster

GPT-5.4

Detailed Comparison

CategoryClaude Opus 5GPT-5.4
ProviderAnthropic OpenAI
Context Window200K 1M WIN
Input Price ($/1M)$15 $2.5 WIN
Output Price ($/1M)$75 $15 WIN
Arena ELON/A 1560 WIN
CodingN/A unknown
ReasoningN/A unknown
Speed (tokens/sec)N/A ~50 t/s WIN
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Opus 5 or GPT-5.4?

GPT-5.4 is approximately 81% cheaper than Claude Opus 5 per million tokens.

Which is better for coding, Claude Opus 5 or GPT-5.4?

Claude Opus 5 scores N/A on coding benchmarks, while GPT-5.4 scores unknown.

Which has a larger context window?

Claude Opus 5 supports 200K context, while GPT-5.4 supports 1M.

Is Claude Opus 5 or GPT-5.4 open source?

Claude Opus 5 is proprietary. GPT-5.4 is proprietary.

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