Mercury 2.5 Preview vs Sonar Reasoning Pro: side-by-side summary

Mercury 2.5 Preview and Sonar Reasoning Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Mercury 2.5 Preview, from inception, has a 260,000-token context window and is priced at $0.04/M tokens input, $0.15/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

• Mercury 2.5 Preview: 260,000 tokens
• Sonar Reasoning Pro: 128,000 tokens

Price

• Mercury 2.5 Preview: $0.04/M tokens input, $0.15/M tokens output
• Sonar Reasoning Pro: $2/M tokens input, $8/M tokens output

Provided by

• Mercury 2.5 Preview: inception
• Sonar Reasoning Pro: Perplexity

• Mercury 2.5 Preview model details, providers and pricing
• Sonar Reasoning Pro model details, providers and pricing