Compare GPT-5.5 Pro from OpenAI and Sonar Pro Search from Perplexity on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
GPT-5.5 Pro and Sonar Pro Search are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.5 Pro, from OpenAI, has a 1,050,000-token context window and is priced at $30/M tokens input, $180/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.