Description
Perplexity AI is an answer engine that returns cited, sourced responses to natural language questions instead of a list of links, orchestrating multiple underlying AI models including ChatGPT, Google Gemini, Anthropic Claude, and NVIDIA Nemotron to generate each answer. The Free plan gives limited daily usage of basic models with citations in every answer. Pro removes most daily limits, adds Perplexity Computer for multi-step agentic tasks, access to 5 or more of the latest AI models with a preferred-model selector, and searches across premium databases like PitchBook and Statista. Max raises every Pro limit roughly tenfold, adds Model Council for comparing multiple models on one query, and includes more monthly Computer credits for sustained agentic work. Comet, Perplexity’s AI browser, is free for all users regardless of subscription tier, with a separate Comet Plus add-on unlocking premium publisher content. It suits researchers, students, and professionals who want sourced, verifiable answers rather than a single unattributed response.
Key Features
- Cited answers — every response includes inline citations showing exactly where each claim comes from.
- Multi-model orchestration — selects or lets users choose from models including ChatGPT, Gemini, Claude, and NVIDIA Nemotron per query.
- Perplexity Computer — agentic system that splits a complex task and routes pieces to different specialized models.
- Model Council — runs a query across multiple models in parallel for comparison, available on Max.
- Premium data sources — searches finance and market intelligence databases like PitchBook, Statista, and S&P Capital IQ.
- Comet browser — free AI-native browser with agentic search and page summarization, independent of subscription tier.
- App connectors — connects 400+ external apps for Pro and Max subscribers to search across.
How It Works
Users type a natural-language question into Perplexity, which selects an appropriate underlying model, searches relevant sources, and returns a direct answer with inline citations rather than a list of links. Free users get limited daily usage of basic models; Pro and Max subscribers can manually select a preferred model from 5 or more options, including frontier models from OpenAI, Google, and Anthropic. For more complex, multi-step tasks, Perplexity Computer breaks a request into subtasks and routes each to a specialized model before returning a synthesized result, drawing from a monthly credit allowance that scales with plan. Model Council, available on Max, runs the same query across multiple models in parallel so a user can compare their answers directly. Comet, Perplexity’s browser, works independently of the subscription tier, adding agentic search and page summarization to everyday browsing at no cost.
Technical Architecture & Overview
- Core Engine: Not one proprietary model; Perplexity orchestrates third-party models (ChatGPT, Google Gemini, Anthropic Claude, NVIDIA Nemotron) alongside its own Sonar models, selecting or letting users choose per query.
- Deployment: Web app, native iOS and Android apps, desktop apps for Mac and Windows, and the separate Comet browser; a developer-facing Sonar API is billed separately from consumer subscriptions.
- API Surface: Sonar API billed per million tokens by model (Small, Large, Huge Online, and Sonar Pro tiers), separate from the flat-rate consumer Pro and Max subscriptions; Pro and Max usage does not apply to API calls.
- Known Limits: Free plan usage is limited on a weekly basis; Perplexity Computer credits are capped per plan (higher on Max) and additional usage-based credits can be purchased once the monthly allowance is used.
Pros & Cons
| Pros | Cons |
|---|---|
| Every answer includes inline citations by default, across every plan including Free | Free plan usage is limited to basic models with capped weekly usage |
| Pro and Max let users manually select a preferred model from frontier options rather than being locked to one | Sonar API pricing is entirely separate from the consumer subscription; Pro and Max usage does not carry over to API calls |
| Comet, Perplexity’s AI browser, is free for all users regardless of subscription tier | Perplexity Computer credits are capped per plan, with additional usage-based credits required once the monthly allowance runs out |
| Perplexity Computer and Model Council extend the platform into agentic, multi-model task execution rather than single-turn chat | Max, at $200/month, is priced for heavy sustained use and may not be worth it for occasional users |
| Premium data sources like PitchBook and Statista are included on Pro and Max rather than sold separately | Enterprise seat pricing (from $40/seat/month) is separate from and more expensive than the individual Pro plan for the same core features |
Platform Availability
Web | iOS | Android | macOS | Windows | Comet browser | API
Best For
Researchers | Students | Professionals needing cited answers | Finance and market research
Frequently Asked Questions
Is Perplexity AI free to use?
Yes. The Free plan costs $0 per month with limited daily usage of basic AI models, citations included in every answer, per Perplexity’s official pricing page.
What is the difference between Pro and Max?
Max includes everything in Pro with roughly 10x higher limits on Deep Research, asset generation, file uploads, and Computer credits, plus Model Council and additional video generation, according to Perplexity’s official FAQ.
Which AI models does Perplexity use?
Perplexity orchestrates multiple top models per query, including ChatGPT, Google Gemini, Anthropic Claude, and NVIDIA Nemotron, with Pro and Max subscribers able to manually select a preferred model, per Perplexity’s official pricing page.
Is Perplexity’s Comet browser free?
Yes. Comet is free for all users regardless of subscription tier; only Comet Plus, a separate add-on for premium publisher content, carries its own monthly cost.
How does Perplexity differ from ChatGPT?
Perplexity is built around cited, source-backed answers and lets Pro and Max subscribers choose from multiple underlying models including GPT and Claude, while ChatGPT is built around OpenAI’s own GPT model family with citations available but not the platform’s core focus.
Similar Tools in This Directory
Also in this directory: ChatGPT, OpenAI’s assistant with bundled Codex access | Claude by Anthropic, coding agent bundled into every paid plan | Google Gemini AI, multimodal assistant integrated into Google Workspace | Meta AI, free assistant built into Facebook, Instagram, WhatsApp | Grok by xAI, real-time X and web search built into chat | Kimi AI, Moonshot’s agentic workspace with a free tier | GLM AI, Zhipu’s free chat backed by open models
