Perplexity Pro

What is Perplexity Pro and who sells it?

Perplexity describes Pro as "the most accurate answers from all the top AI models", and says every answer includes inline citations from trusted sources (Perplexity website, October 2026). The page now leads with Perplexity Computer for agentic apps and documents next to research. Pro includes Deep research, model selection, 4,000 bonus credits and expanded Computer access. The models on offer come from OpenAI, Google, Anthropic, Moonshot, Z.ai and xAI.

Perplexity AI is in San Francisco and was founded in August 2022 by Aravind Srinivas (CEO), Denis Yarats, Johnny Ho and Andy Konwinski. The last priced round was reported at about a $23B valuation in January 2026, and funding totals range from $1.2B to more than $2B depending on source (Tracxn). Talks at a valuation above $30B were reported in August 2026 and had not closed. The company is private.

How well does it answer medical questions?

A 2025 JMIR study put 130 American Academy of Neurology guideline questions to Perplexity's Sonar models through the API, so the result describes those models and was not run on the Pro app. Sonar scored 60% correct on the open web and 78% when limited to aan.com and neurology.org. Sonar-Pro scored 80% against 88%, and Sonar-Reasoning-Pro 81% against 89%. OpenEvidence scored 82%, so on the open web it beat all three, and the two limited Pro-tier models beat it. Two neurologists rated the answers, and the authors note that domain overlap may inflate the gain from whitelisting (JMIR 2025, article e79379).

A 2026 JMIR study by Labenbacher and colleagues tested the free versions of nine generative AI tools on 15 retracted articles. Perplexity answered all five questions correctly for 5 of the 15 articles, or 33%, and included a retracted article in topic overviews in 6 cases, or 40% (PMID 42066286).

Where does it fall short?

Reviewers find the source mix variable. iatroX and EvidenceMD, both makers of competing medical AI products, say the citations link to real pages that are not necessarily guidelines. EvidenceMD's 2026 ranking puts Perplexity eighth among medical AI tools because of citation accuracy. A review at ai101.health suggests Pro Search for a quick refresher but says UpToDate and DynaMed remain faster and more reliable for established conditions.

Is it safe for patient data?

Sources conflict. Paubox says enterprise tiers may be HIPAA-compliant only with a signed BAA whose text is not public. Sonomos says no tier has a BAA and Enterprise Pro has only a data processing agreement. Perplexity's Enterprise terms, updated in February 2026, say Enterprise Pro and Max may not process PHI without a BAA. Perplexity Health is a consumer wellness product, and its help center says HIPAA does not apply to it (via Paubox). Both sources advise keeping PHI out. SOC 2 and HITRUST are not stated for Pro. No EHR integration is listed, and it is not a medical device.

How much does Perplexity Pro cost?

Pro costs $17 per month billed annually and Max $167 per month billed annually, with a free tier below them. Pro currently adds $40 of free Computer credits for a limited time. A monthly-billing price is not published (Perplexity pricing page, October 2026).

How does it compare?

Consensus, Elicit, Scite, SciSpace, Semantic Scholar and Undermind are narrower research tools that search papers. OpenEvidence, UpToDate Expert AI, ChatGPT and Claude are the usual comparisons for clinical questions. In the neurology study, OpenEvidence's 82% beat Perplexity's open-web Sonar results (60% to 81%), while whitelisted Sonar-Pro (88%) and Sonar-Reasoning-Pro (89%) scored higher than OpenEvidence.

The verdict

Use Perplexity Pro as a starting point for a question you can verify against the cited pages. Do not use it as the only source behind a clinical decision, because the open-web and retracted-paper results show it can surface weak sources. A clinician who wants answers tied to guidelines should pay for a tool built on clinical sources, and PHI stays out unless an enterprise contract with a BAA says otherwise.