I regularly use the Perplexity API, whether from the command line or by letting Claude use it through an MCP, as a second search engine for its research. That’s why I paid attention when, about a week ago, an email from Perplexity landed in my inbox with the subject line “Your Sonar workload runs better on Agent API.” The pitch: their newer Agent API beats the classic Sonar models I’d been using, on both quality and cost.
Their own benchmarks put the cheapest Agent preset at roughly twice the accuracy of Sonar for about the same money, with the deeper presets reaching a level Sonar can’t touch (79.67% vs. 29.10% on BrowseComp for the high preset against Sonar Deep Research, at about 27% higher cost per query).
Marketing numbers, of course, but the direction made sense, and Perplexity is clearly steering everyone from Sonar to the Agent API (though they did also say Sonar isn’t going away).
I wanted to try it out and switch to the better, more efficient engine. It sounded easy, only it wasn’t.


