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Claude Opus 4.5 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 4.5GPT-5.4
ProviderAnthropic OpenAI
Context Window200K 1M WIN
Input Price ($/1M)$5 $3 WIN
Output Price ($/1M)$25 $15 WIN
Arena ELO1380 1560 WIN
Coding80.9% SWE-bench unknown
Reasoningunknown unknown
Speed (tokens/sec)~35 t/s ~50 t/s WIN
Open SourceNo No

Frequently Asked Questions

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

GPT-5.4 is approximately 40% cheaper than Claude Opus 4.5 per million tokens.

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

Claude Opus 4.5 scores 80.9% SWE-bench on coding benchmarks, while GPT-5.4 scores unknown.

Which has a larger context window?

Claude Opus 4.5 supports 200K context, while GPT-5.4 supports 1M.

Is Claude Opus 4.5 or GPT-5.4 open source?

Claude Opus 4.5 is proprietary. GPT-5.4 is proprietary.

Which ranks higher on the Chatbot Arena leaderboard?

GPT-5.4 ranks higher with ELO 1560 vs 1380.