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GPT-5.4 vs Kimi K3

GPT-5.4 leads in 3 of 8 categories

Arena ELO

GPT-5.4

Cheaper

Kimi K3

Faster

GPT-5.4

Detailed Comparison

CategoryGPT-5.4Kimi K3
ProviderOpenAI Moonshot AI
Context Window1M WIN128K
Input Price ($/1M)$2.5 $0.6 WIN
Output Price ($/1M)$15 $2.5 WIN
Arena ELO1560 WINN/A
Codingunknown N/A
Reasoningunknown N/A
Speed (tokens/sec)~50 t/s WINN/A
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, GPT-5.4 or Kimi K3?

Kimi K3 is approximately 82% cheaper than GPT-5.4 per million tokens.

Which is better for coding, GPT-5.4 or Kimi K3?

GPT-5.4 scores unknown on coding benchmarks, while Kimi K3 scores N/A.

Which has a larger context window?

GPT-5.4 supports 1M context, while Kimi K3 supports 128K.

Is GPT-5.4 or Kimi K3 open source?

GPT-5.4 is proprietary. Kimi K3 is open source.

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