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Grok 3 vs Kimi K3

Grok 3 leads in 3 of 8 categories

Arena ELO

Grok 3

Cheaper

Kimi K3

Faster

Grok 3

Detailed Comparison

CategoryGrok 3Kimi K3
ProviderxAI Moonshot AI
Context Window131K WIN128K
Input Price ($/1M)$3 $0.6 WIN
Output Price ($/1M)$15 $2.5 WIN
Arena ELO1325 WINN/A
Codingunknown N/A
Reasoning93.3% AIME 2025 N/A
Speed (tokens/sec)~55 t/s WINN/A
Open SourceNo Yes

Frequently Asked Questions

Which is cheaper, Grok 3 or Kimi K3?

Kimi K3 is approximately 83% cheaper than Grok 3 per million tokens.

Which is better for coding, Grok 3 or Kimi K3?

Grok 3 scores unknown on coding benchmarks, while Kimi K3 scores N/A.

Which has a larger context window?

Grok 3 supports 131K context, while Kimi K3 supports 128K.

Is Grok 3 or Kimi K3 open source?

Grok 3 is proprietary. Kimi K3 is open source.

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