Claude Opus 5 (Fast) vs Sonar Pro Search: side-by-side summary

Claude Opus 5 (Fast) and Sonar Pro Search are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 5 (Fast), from Anthropic, has a 1,000,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.

Sonar Pro Search, from Perplexity, has a 200,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Context window

• Claude Opus 5 (Fast): 1,000,000 tokens
• Sonar Pro Search: 200,000 tokens

Price

• Claude Opus 5 (Fast): $10/M tokens input, $50/M tokens output
• Sonar Pro Search: $3/M tokens input, $15/M tokens output

Provided by

• Claude Opus 5 (Fast): Anthropic
• Sonar Pro Search: Perplexity

• Claude Opus 5 (Fast) model details, providers and pricing
• Sonar Pro Search model details, providers and pricing