Grok vs Perplexity: Perplexity wins on sources, and its Pro plan even includes Grok

Which is better, Grok or Perplexity?

Perplexity, if anyone will check what you quote. Its pricing page lists "Citations in every answer" even on the free plan, as of October 2026. xAI's pricing page doesn't mention citations or sources anywhere. It sells Grok on "Real-time web and X search", which every Grok plan has, free included.

The 94% comes from the Tow Center for Digital Journalism at Columbia, which ran 1,600 queries in February 2025. Each of the eight AI search tools it tested got 200 excerpts from real news stories, and for each one it had to name the headline, the publisher, the date and the URL. The Grok 3 it tested was the paid version, which cost $40 a month at the time. The Perplexity it tested was the free one.

Read the date first. xAI has replaced Grok 3 with the Grok 4 family since, and we haven't found a rerun of this test on Grok 4.7 as of October 2026. What hasn't changed is the design. Perplexity is a search engine that shows you its work. Grok is a chatbot that is wired into X, and it's the one you ask about what people posted an hour ago.

Does Grok cite its sources like Perplexity does?

Both attach links, but only Perplexity promises one on every answer. Its help page for Perplexity Pro adds "10x as many citations per answer" on the paid plan. Grok's links were the weak point in the Tow Center test, and its write up says so plainly: "Out of the 200 prompts we tested for Grok 3, 154 citations led to error pages."

That's 154 dead links across 200 prompts. The Tow Center report says more than half of Grok 3's responses cited fabricated or broken URLs, and even when Grok named the right article, it often linked to a URL that didn't exist. Grok 2 had a different habit. It tended to link to the home page of the outlet instead of to the story itself.

Perplexity didn't come out clean. The paid tier was worse than the free one in a specific way. Perplexity Pro correctly identified nearly a third of 90 excerpts from publishers that had blocked its crawler, and the report found premium tools in general gave more confidently wrong answers than free ones. Perplexity also answered 37% wrong, which isn't good. It was simply the best of the eight.

If you want a long research report, only Perplexity tells you how many you get. Its plan comparison gives you 1 Research query a month on Free, "Monthly limits (average use)" on Pro and 50 a month on Enterprise Pro. xAI's pricing and checkout pages don't name a research mode at all as of October 2026. They list Expert mode and Grok Bot instead, and when you run a long job in Grok it comes out of the same weekly pool as all of your other chats.

One habit fixes most of this in either tool. Click the link behind any number you plan to repeat, and check that the page says it.

How much do SuperGrok and Perplexity Pro cost?

Perplexity Pro costs $20 a month and SuperGrok costs $30, so Perplexity is the cheaper paid plan by $10. xAI sells more tiers, with a $10 plan at the bottom and $300 at the top. US prices as of October 2026, from x.ai/pricing, xAI's checkout page, Perplexity's pricing page and its plan comparison:

Neither company prints a message count for its main plan. Perplexity Pro's Pro Searches are "Weekly limits (average use)". xAI's Grok FAQ describes "one shared weekly usage pool" across chat, Imagine, voice and Build, shown as a percentage in Settings, then Usage. Perplexity Pro limits covers what the Perplexity counters actually show, and Grok usage limit reached covers what happens when the Grok bar fills.

One mismatch before you pay. In October 2026 xAI's pricing page listed the "Grok 4.7 model" for SuperGrok, while the checkout page headline still said "Chat with Grok 4.6".

Can you use Grok inside Perplexity?

Yes. Perplexity Pro includes Grok 4.6, one of eight search models in its picker. Perplexity's model table, a snapshot dated 4 September 2026, lists Sonar 2, GPT-5.6 Terra, Gemini 3.7 Flash, Claude Sonnet 5, Kimi K3, GLM 5.3, Grok 4.6 and Nemotron 3 Ultra. Max adds GPT-5.6 Sol and Claude Opus 5, but no newer Grok.

So if you were going to pay $30 for SuperGrok to get a Grok model with search, Perplexity Pro gets you one for $10 less. The catch is which Grok it is. Artificial Analysis marks Grok 4.6 as deprecated and scores it 44 on its Intelligence Index (v4.3.2, read 12 October 2026), against 46 for Grok 4.7. Two points is a small gap. The bigger one is everything around the model.

Perplexity's plan and model pages don't mention X search at all. So in Perplexity, Grok writes the answer over Perplexity's web results, with Perplexity's citations on top. You don't get live X posts, Grok Imagine video or Grok Bot. Perplexity also says the model selector in your account "is always the source of truth", so check it before paying for any one model.

Is Grok or Perplexity better for real-time news and X posts?

Grok is better for X posts, and Perplexity is better for checking a news story. Those are different jobs. When a launch or an outage is an hour old, the first reports you can find are often posts on X, and Grok can search X on every plan it sells. None of Perplexity's pages claim that it can do the same.

The Tow Center report adds a twist. It notes, citing Reuters, that even Grok, "which encourages users to get real-time updates from X, still overwhelmingly cites traditional news organizations." So when you ask it about the news, Grok often leans on the same outlets that Perplexity does, and in the test its links to them broke 154 times in 200 prompts. Fast isn't the same as right. Use Grok to see what people are saying, then use Perplexity, or the original article, to check what actually happened.

If you build on the API, the two of them charge for search in different ways. The API pricing that xAI published on 29 September 2026 charges $5 for every 1,000 X posts that its X Search tool returns. It also charges $5 for every 1,000 web search calls. Those fees sit on top of Grok 4.7's $2 per million input tokens and $6 per million output. Perplexity's API pricing lists its Search API at $5 per 1,000 requests. Sonar Pro costs $3 per million tokens in and $15 out, plus $6 to $14 per 1,000 requests depending on search depth, as of October 2026.

Do Grok and Perplexity train on your chats?

Both can, and both let you switch it off. xAI's consumer FAQ says "You control whether your data is used for training Grok." In the app, go to Settings, then Data Controls, and turn off "Improve the model". Grok's Private Chat, the ghost icon at the top right, isn't used for training, and xAI deletes those chats within 30 days.

Perplexity's data collection page, last modified 3 September 2026, says AI Data Retention is on by default for Free, Pro and Max. The switch is in Account settings, under Preferences. Timing matters, because "Previously collected training data cannot be deleted or removed." Turn it off before your first real question. Enterprise Pro is the one Perplexity plan whose data is "never used for model training".

Should you pick Grok or Perplexity?

Pick Perplexity unless your work depends on X or on video. Here's the split by situation, as of October 2026:

If you want both without two bills, Whizi Pro at $29.99 a month carries Grok 4.7 and Perplexity's Sonar Pro in one picker, with web search on by default. A Grok message costs 6 credits and a Sonar Pro answer 20, out of 2,500 a month, and side by side model chats send one question to both. It doesn't list live X search, Grok Imagine, Perplexity's Research mode or Comet. If one of those is why you're buying, buy the vendor's plan.