AI is now central to PPC strategy—but not all AI tools are created equal. A recent benchmark test by WordStream reveals a surprising truth: 20% of AI-generated PPC advice is wrong.
That’s a problem for advertisers who rely on tools like ChatGPT, Google AI Overviews, Meta AI, and Perplexity to make critical campaign decisions.
But there’s one exception.
Google Gemini stood out with the lowest error rate: just 6%.
Let’s break down why Gemini is now the most trusted large language model (LLM) for PPC professionals—and what that means for your ad spend in the second half of 2025.
The Test: Which AI Tools Can You Really Trust for PPC?
To determine how well AI tools perform in real-world PPC situations, WordStream asked five popular platforms 45 PPC-related questions, covering:
- Bidding strategies in Google Ads 2025
- Improving Quality Score
- Writing Google Ads scripts to pause high CPC keywords
Here’s how the tools ranked by inaccuracy:
- Google AI Overviews: 26% incorrect
- ChatGPT: 22% incorrect
- Meta AI: 20% incorrect
- Perplexity: 13% incorrect
- Google Gemini: Only 6% incorrect
Why It Matters
A 20% error rate in PPC isn’t just inconvenient—it’s costly. Inaccurate AI recommendations can lead to:
- Poor bidding strategies
- Wasted ad spend on broad-match, high-CPC keywords
- Missed optimization opportunities
As AI becomes more deeply integrated into marketing workflows, choosing the right tool and verifying its recommendations is crucial for protecting ROI.
What Gemini Gets Right
- Up-to-date data: Gemini delivered responses aligned with 2025 Google Ads benchmarks.
- Better keyword suggestions: Unlike others, it avoided generic high-competition terms and focused on cost-effective, niche keywords.
- Platform awareness: While Meta AI leaned toward Facebook Ads even when asked about Google, Gemini stayed focused on the right ecosystem.
- Neutral tone: ChatGPT, in contrast, often defaulted to overly positive feedback.
What About Coding & Scripts?
Interestingly, Gemini and Google AI Overviews declined to provide ad scripts for pausing high-cost keywords, citing potential misuse. While this may show a safety-first approach, it also raises questions about advertiser autonomy and usability.
Key Takeaways for PPC Marketers
To make AI work for you (and not the other way around), here’s what you need to do:
Use the right AI for the right platform
- Gemini = Google Ads
- Meta AI = Facebook/Instagram Ads
Craft better prompts
- The more context you provide, the more accurate the response.
Trust, but verify
- Don’t treat AI advice as gospel—always cross-check with live benchmarks and experienced PPC professionals.
AI isn’t going anywhere. But in PPC, accuracy equals performance—and performance equals profit. If you’re relying on AI to guide your Google Ads strategy in 2025, Google Gemini is currently your safest bet.
As PPC experts in New York, SEO Guru NYC stays ahead of AI trends to help businesses maximize ROI with data-driven Google Ads strategies. Whether you’re navigating Gemini, improving Quality Score, or refining bidding tactics, our team ensures you get results—not guesswork.
Ready to make AI work for your PPC campaigns? Contact us today for a custom strategy session.
