Sonar: What It Is and How It Affects AI Search Visibility
Sonar is Perplexity's own lightweight search model and the workhorse behind its default search experience. Perplexity trained it specifically to enhance answer factuality and readability for the default search mode, and it grounds every answer in live web retrieval with numbered citations to sources.
Sonar Key Facts
What Sonar Is Used For
Sonar is what most Perplexity answers run on. Perplexity's help center describes the default model as optimized for quick searches and web browsing, available to free and Pro users, and the Meet the new Sonar post confirms Sonar was further trained for exactly that default search mode. Free users get the default plus limited Pro searches; the Best mode picks a model per query.
On the developer side, Sonar is the entry model of the API: web-grounded chat completions with citations and structured search results in every response.
Retrieval and Citation Behaviour
Perplexity describes its pipeline plainly: it searches the internet in real time, reads authoritative sources, summarizes them, and attaches numbered citations linking to the originals, per its how it works page. API responses carry a citations array and structured search results, per the Sonar overview.
That makes Perplexity the most citation-transparent engine you can optimize for. Every answer publishes its source list, which is both the scoreboard and the study material: run your customer queries, read who got cited, and reverse-engineer why.
How to Be Visible When Sonar Handles the Query
These are the actions justified by my Perplexity SEO guide, in priority order for the default search model.
- Allow PerplexityBot and Perplexity-User. Verify robots.txt and your CDN are not blocking them; access is the gate to every Sonar answer. The walkthrough is in my Perplexity SEO guide.
- Feed the recency bias. Perplexity favors fresh sources, so dated updates on cornerstone pages and a steady publishing cadence directly move citation share.
- Write answer-shaped pages. Numbered citations reward passages that stand alone: a direct answer per heading, claim-level sentences, clean structure.
- Mine the citation lists. Every Sonar answer names its sources; treat them as a free gap analysis. The full workflow is in how to find content gaps using AI engines.
- Harden entity facts. Consistent name, category and claims across your site and third-party sources give the answer engine a brand it can safely cite.
- Hire it out if you want speed. The Perplexity SEO expert service runs this playbook end to end.
Related Perplexity Models
Frequently Asked Questions
What model does Perplexity use by default?
How does Sonar choose which sites to cite?
Is Sonar being discontinued?
Can I see why my site was or was not cited?
Anshul Rana
I am an AI SEO, AEO and GEO specialist with 8+ years of experience helping businesses get found on Google and AI platforms like ChatGPT, Gemini, Claude and Perplexity. Top Rated Plus on Upwork with a 100% Job Success Score and 1,000+ websites optimized, working with clients across the US, the UK, Australia and India. I run The Digital Geek for agency-level engagements.
Sources
Every fact on this page comes from Perplexity's own documentation and announcements, listed below and linked inline where each fact appears.
- Perplexity: Meet the new Sonar
- Perplexity: Sonar model documentation
- Perplexity: how Perplexity works
- Perplexity: default model help article
- Perplexity: Sonar API overview
- Perplexity: Agent API models
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