Grok 4.6 vs Kimi K3: side-by-side summary

Grok 4.6 and Kimi K3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Grok 4.6, from SpaceXAI, has a 500,000-token context window and is priced at $2/M tokens input, $6/M tokens output on OpenRouter.

Kimi K3, from moonshotai, has a 1,048,576-token context window and is priced at $2.80/M tokens input, $14/M tokens output on OpenRouter.

Context window

• Grok 4.6: 500,000 tokens
• Kimi K3: 1,048,576 tokens

Price

• Grok 4.6: $2/M tokens input, $6/M tokens output
• Kimi K3: $2.80/M tokens input, $14/M tokens output

Provided by

• Grok 4.6: SpaceXAI
• Kimi K3: moonshotai

• Grok 4.6 model details, providers and pricing
• Kimi K3 model details, providers and pricing