Buyer Behavior

94% of B2B Buyers Now Use LLMs During Vendor Evaluation

New research shows 94% of B2B buyers now use LLMs during vendor evaluation, pushing more of the journey into channels no marketer can track.

By The Pull Desk·August 31, 2026·5 min read
Buyer Behavior

94% of B2B Buyers Now Use LLMs During Vendor Evaluation

The short version

THE SHORT VERSION: 94% of B2B buyers now use LLMs like ChatGPT, Claude, or Gemini somewhere in their procurement research, according to 2026 dark-funnel research. The average buying journey has stretched to 272 days across 88 touchpoints, and generative AI is now a top-five discovery channel. Attribution just got harder.

What happened

Aggregated 2026 research from Similarweb, Oktopost, and StartupHub summarized in this month's B2B dark-funnel briefing puts three numbers next to each other for the first time. 94% of B2B buyers now use LLMs during procurement and research. 70 to 73% of the buying journey now happens in the dark funnel before a prospect ever fills a form. And the average journey now spans 272 days across 88 touchpoints, with buyers using an average of 10 channels along the way. Generative AI has moved into the top five channels for supplier discovery, alongside search, LinkedIn, peer communities, and analyst reports. None of the LLM activity shows up in your standard MQL dashboard. The buyer opens ChatGPT, asks for the top three vendors in a category, reads a summary that pulls from Reddit and G2, and lands on your site already qualified or already ruled out.

Why B2B buyers using LLMs matters now

From the publisher

MagnetizeX builds founder visibility systems for B2B firms.

See how →

For founders, the operational shift is not that AI is influencing buyers. It is that the shortlist is now being drafted by a summarizer that most sales teams cannot see and cannot influence in the moment. If the LLM's answer for your category names three competitors and skips you, your inbound funnel has a leak that no form-fill optimization will patch. And because the buyer arrives 70% of the way through their journey, the sales conversation now starts on the other side of a filter you did not build. This is the actual reason first-meeting conversion rates are compressing this year.

  1. Run the vendor-shortlist prompt yourself

    Open ChatGPT, Claude, Perplexity, and Google AI Overviews. Ask each: What are the top vendors for [your category] in 2026. Screenshot every answer. If your brand is missing from three of the four, you have a citation problem, not a positioning problem, and the fix is inside the sources those models retrieve from.

  2. Audit the Reddit and G2 threads for your category

    LLMs disproportionately retrieve from Reddit, G2, and other high-authority discussion sources. Search Reddit for [your category] plus the word alternative and read the top 10 threads. If competitors are being named and defended and you are not, that is the actual training substrate for tomorrow's LLM answers. Show up in those threads as a real named operator, not a brand.

  3. Ask new customers where they first heard you

    Add one question to your kickoff call: what did you type into ChatGPT or Google before we spoke. Track the exact phrasing for 30 days. The pattern you see is your real ICP intent language, and it belongs on your homepage H1 before the end of the quarter.

What to do this week

Sign up for Profound or Otterly, plug in five prompts a buyer would ask about your category, and set a weekly alert. Then commit to two Reddit or LinkedIn comments per week under your real name in threads where those prompts already play out. Both are under a two-hour ask and both feed the exact substrate the LLMs will retrieve from next quarter.

Related in Buyer Behavior