Grok 4.6 vs Sonar Reasoning Pro: side-by-side summary

Grok 4.6 and Sonar Reasoning Pro 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.

Sonar Reasoning Pro, from Perplexity, has a 128,000-token context window and is priced at $2/M tokens input, $8/M tokens output on OpenRouter.

Context window

• Grok 4.6: 500,000 tokens
• Sonar Reasoning Pro: 128,000 tokens

Price

• Grok 4.6: $2/M tokens input, $6/M tokens output
• Sonar Reasoning Pro: $2/M tokens input, $8/M tokens output

Provided by

• Grok 4.6: SpaceXAI
• Sonar Reasoning Pro: Perplexity

• Grok 4.6 model details, providers and pricing
• Sonar Reasoning Pro model details, providers and pricing