Mistral Small 4 vs Sonar Reasoning Pro: side-by-side summary

Mistral Small 4 and Sonar Reasoning Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Mistral Small 4, from Mistral AI, has a 262,144-token context window and is priced at $0.15/M tokens input, $0.60/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

• Mistral Small 4: 262,144 tokens
• Sonar Reasoning Pro: 128,000 tokens

Price

• Mistral Small 4: $0.15/M tokens input, $0.60/M tokens output
• Sonar Reasoning Pro: $2/M tokens input, $8/M tokens output

Provided by

• Mistral Small 4: Mistral AI
• Sonar Reasoning Pro: Perplexity

• Mistral Small 4 model details, providers and pricing
• Sonar Reasoning Pro model details, providers and pricing