Perplexity vs Grok: which AI assistant should you use?

Short answer: pick Perplexity if your job is research you have to defend — cited answers from the open web, Deep Research reports, and a model picker that lets you switch between top AI models. Pick Grok if you want an all-round assistant that is plugged into what is happening on X right now, with image and video generation, voice and agents in the same subscription. Researchers and analysts usually land on Perplexity; people who live on X, or who also want Cursor and Grok Bot on one plan, usually land on Grok.

Both are on Unloc. Perplexity already has head-to-heads with Gemini, ChatGPT and Claude; Grok has its own with ChatGPT, Claude and Gemini. This page closes the gap between the two. Claims below come from each vendor’s own product, pricing and help pages, attributed to the vendor; plans and model line-ups move often, so check the live pricing pages before you buy.

Quick verdict

What Perplexity is

Perplexity’s help centre calls it an AI-powered search engine: you ask a question, it searches the web in real time, and it answers in plain language with citations and links back to the original sources so you can verify what it says. That is the whole personality of the product. Where a chat assistant leads with a conversation, Perplexity leads with a short answer and a row of sources.

Around that core sit several modes. Search handles everyday questions and, on eligible plans, applies Pro Search automatically. Deep Research (the help centre also calls it Research) runs many searches, reads widely and writes a full report you can export or turn into a shareable Page. Model Council, on the Max tiers, runs several models on the same question and synthesises their answers. Learn Mode turns a topic into explanations and quizzes. Perplexity also markets premium data sources inside answers for paid users.

The newer layer is agentic. Perplexity describes Computer as an independent digital worker that researches, writes documents and slides, builds simple apps and works through connected apps such as Gmail, Slack, Notion, GitHub and Linear, in a cloud sandbox. Automations let Computer run recurring work like monitoring and briefings on a schedule, and Comet is Perplexity’s own browser with an assistant that can act on pages for you. Computer runs on credits, so heavy use is metered separately from ordinary searches.

One detail matters for this comparison: Perplexity’s model list for paid Search plans includes a Grok model from xAI alongside models from OpenAI, Anthropic, Google and others. The help centre calls that list a snapshot and says the model selector in your account is the source of truth.

What Grok is

Grok is the assistant built by xAI, which x.ai now presents under the SpaceXSI (SpaceX Super Intelligence) name. xAI’s Grok page pitches it as AI that is useful for everyone: chat, search, reasoning and creation in one place, with answers that reflect what is happening now. It runs on grok.com, in iOS and Android apps, and inside X.

xAI says Grok searches the web and X live, with citations from primary sources and real-time X integration for breaking news and trends. On top of that it lists step-by-step reasoning you can follow, a multi-agent mode where parallel agents tackle parts of a hard question and merge into one cited answer, Imagine for text-to-image and text-to-video, natural voice conversations, file and PDF analysis, vision, memory across chats, a canvas for long-form writing, custom instructions and shareable threads. The grok.com interface also offers a Build mode for creating apps.

The subscription is now broader than the chatbot. xAI’s pricing page sells what it calls one subscription with access to everything: Grok Chat, Voice, Imagine and Build, Grok API access, Cursor, and X Premium features, with Grok Bot — xAI’s persistent agent — on higher tiers. A shared usage pool spans Grok and Cursor and refreshes weekly, according to the same page. For teams, xAI’s business page lists SSO, SCIM, connectors to tools such as Salesforce, HubSpot, Slack and Notion, and a no-training commitment on business plans.

The real fork: cited research versus live, all-round assistant

Both tools search the web and both show citations, so the split is not “one searches, one does not”. The split is what each product optimises for.

Perplexity’s win condition is an answer you can paste into a memo with the sources attached. The interface, the Deep Research reports, the export options and the model picker all serve that. If someone asks “where did this come from?”, Perplexity wants the answer to be one click away.

Grok’s win condition is being the one assistant you open for anything, with a live line into X. It is strongest when the question is about what just happened, what people are saying, or when you want to go from a question to an image, a video clip or a voice chat without changing apps.

A quick test: if most of your prompts start with “find”, “compare” or “summarise the evidence”, lean Perplexity. If they start with “what’s going on with”, “draft”, “make me an image” or “talk me through”, lean Grok.

Search, sources and freshness

Perplexity says content is sourced from the web in real time for each question and that responses are supported by citations from news organisations, academic publications and established sources. Pro Search and Deep Research push further, reading more pages before they answer. File and app connectors (Google Drive and Dropbox for Pro, per the help centre) let you search your own documents alongside the web.

xAI says Grok searches the web and X live, with follow-up questions to drill deeper. The X feed is the distinctive input: posts, trends and reactions as they happen. That is valuable for news, markets chatter, product launches and public sentiment. It also means you should treat social posts as signals to verify, not as settled facts.

Neither tool removes the need to open the source. Perplexity makes that habit easier by design; Grok gives you a faster read on the conversation. For anything you will publish or decide on, click through.

Models, agents and creation

Model choice. Perplexity is model-agnostic by design. Free users get the automatic Best option; paid users can choose specific models from several providers, and Perplexity’s own pages list a Grok model among them. Grok runs on xAI’s own Grok models. xAI’s pricing FAQ says self-serve plans include generous Grok usage but no allowance for third-party models, which remain available in Cursor at API list prices.

Agents. Perplexity’s Computer is aimed at long-running deliverables — reports, decks, spreadsheets, simple apps — across your connected tools, with Automations for recurring jobs and Comet for browser tasks. Grok offers multi-agent reasoning in chat, and xAI positions Grok Bot as a persistent agent with its own computer for ongoing work on higher plans. If persistent agents are the real reason you are shopping, read Grok Bot vs OpenClaw too.

Creation. Grok leads here. xAI lists image and video generation, edits through follow-up prompts, voice conversations and a writing canvas as core features. Perplexity’s help centre says paid plans can generate and edit images (and its plan guide mentions video), but creation is a side door in a research product, not the front door.

Privacy and team controls

Perplexity says its agreements with third-party model providers such as OpenAI and Anthropic prohibit training on Perplexity data, that Pro, Education Pro and Max users can opt out of data collection in settings, and that Enterprise Pro and Enterprise Max data is never used for training. It lists SSO, admin controls and SOC Two Type Two certification for Enterprise.

xAI’s business page lists SOC Two, HIPAA, GDPR and CCPA, SSO and SCIM, role-based access, custom data retention, customer-managed encryption keys on Enterprise and “no training” among business plan features. For personal plans, read the current privacy settings in your account rather than assuming business terms apply. Both lists are vendor claims, not an Unloc audit.

Pricing models

Perplexity’s help centre lists individual plans named Free (Standard), Pro, Max and Education Pro, plus Enterprise Pro, Enterprise Max and a separate API Platform. Paid tiers raise limits on Pro Search, Deep Research and model access; Computer work draws on credits on top of that.

xAI’s pricing page lists Free, Plus, Premium, Super and Ultra for individuals, plus Teams and Enterprise. Each tier bundles Grok, Cursor and X Premium features with a shared, weekly-refreshing usage pool; xAI recommends Premium for new AI users and says API usage is billed separately. We do not quote prices or quotas here because they change often and vary by region.

Check the live Perplexity plans page and Grok pricing page the week you buy, and look at what the bundle includes, not just the headline seat.

Who should pick which

Pick Perplexity if you research for a living or for decisions: analysts, consultants, founders doing market scans, students, journalists and marketers building briefs. Pick it if you want to compare answers across model providers without paying for several chat apps, or if you want an agent that turns research into finished documents.

Pick Grok if X is part of your work — creators, social and comms teams, traders watching sentiment, founders tracking launches — or if you want one assistant for chat, images, video and voice. Pick it if you already pay for X Premium or Cursor since the bundle can change the maths.

Pick both only with a written rule: Grok to spot what is moving, Perplexity to confirm it with sources before anything goes into a deck, post or decision. If you cannot name which tool owns which step, keep one and cancel the other.

Not sure either fits? If you mostly want a general writing and reasoning partner, see Grok vs ChatGPT and Perplexity vs ChatGPT. If you are leaving Grok for another reason, our Grok alternatives guide lists the strongest options on Unloc.

Can you use Perplexity and Grok together?

Yes, and in an odd way you already can inside one app: Perplexity’s paid model picker lists a Grok model, so you can run Grok’s reasoning over Perplexity’s search and citation layer. That is not the same as the Grok app — you will not get Grok’s X feed integration, Imagine, voice or Grok Bot that way, and availability can change as Perplexity updates its line-up.

The cleaner pattern is two jobs, two tools. Use Grok to scan the live conversation and draft; use Perplexity to verify claims and gather sources. Keep sensitive company data out of personal accounts on both, and on teams, use the business or enterprise tiers that carry the admin and privacy controls each vendor lists.

Workflows that hold up

Morning news brief. Ask Grok what is trending in your space on X and the web. Take the three stories that matter and ask Perplexity for a sourced summary of each. Paste only the sourced version into the team channel.

Market or competitor scan. Perplexity Deep Research for the report, with sources. If you need it every week, hand it to Computer and an Automation. Use Grok for a quick read on how customers are reacting publicly.

Content creation. Grok to brainstorm angles from what people are discussing, draft in the canvas and generate a supporting image. Perplexity to fact-check every claim and statistic before the post goes live.

Launch day. Grok to watch reactions on X in real time. Perplexity to pull together the coverage with links for the recap.

FAQ

Is Perplexity better than Grok for research?

For research you need to cite, usually yes. Perplexity is built around sourced answers, Deep Research reports and exportable results, and lets paid users switch between models from several providers. Grok also searches the web with citations, but its edge is live X context and all-round creation rather than research workflows.

Does Grok use X data in its answers?

Yes, that is one of xAI’s main selling points. xAI says Grok searches the web and X live, so answers reflect breaking news and trends. Treat social posts as signals worth checking, and click through to the original sources before you rely on them.

Can I use Grok inside Perplexity?

Perplexity’s own model list for paid Search plans currently includes a Grok model from xAI. That gives you Grok’s reasoning on top of Perplexity’s search and citations, but not the Grok app’s X integration, image and video generation, voice or Grok Bot. Check the model selector in your account, since line-ups change.

Which is better for creating images and video?

Grok. xAI lists text-to-image and text-to-video through Imagine, with edits by follow-up prompt, as core features across its plans. Perplexity offers image generation on paid plans, but creation is not its main job.

Which is cheaper, Perplexity or Grok?

It depends on what you count. Both have free tiers and several paid tiers. Grok’s plans bundle Cursor and X Premium features, which matters if you would pay for those anyway; Perplexity’s plans focus on research limits, model access and Computer credits. Compare the live pricing pages for the features you will actually use.