AI for SEO: Which LLM Is Best for Your Marketing Tasks?
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Zack Saadioui
8/13/2025
AI for SEO: Which LLM Is Best for Your Marketing Tasks?
Alright, let's talk about something that's been on every SEO's mind lately: AI. Specifically, Large Language Models or LLMs. It feels like every other day there's a new AI tool or a new update to an existing one, & it can be kinda overwhelming to keep up. Honestly, it's a seismic shift in how we approach search engine optimization. If you're not paying attention, you're gonna get left behind.
But here's the thing, not all LLMs are created equal, especially when it comes to the nitty-gritty of SEO. Some are fantastic for churning out creative blog posts, while others are better at dissecting technical SEO issues or figuring out what your customers are really asking. So, which one should you be using for your marketing tasks? That's the million-dollar question, right?
I've been in the trenches, playing around with these different models, & I've learned a ton. In this guide, I'm going to break it all down for you. We'll look at the big players like GPT-4, Google's Gemini, & Claude 3, & see what they're good at, what they're not so good at, & how you can use them to seriously level up your SEO game. We'll cover everything from content creation & keyword research to the more technical stuff & even how AI is changing the game in link building & user engagement.
The Big Three: A Head-to-Head for SEO Dominance
Before we dive into specific SEO tasks, let's get a feel for the main contenders. Think of it like choosing your character in a video game – each one has different stats & special abilities.
1. OpenAI's GPT-4: The Creative Wordsmith
GPT-4 is probably the most well-known LLM out there, & for good reason. It's incredibly versatile & excels at generating human-like text. For SEOs, this is a HUGE deal.
Content Creation: This is where GPT-4 really shines. It can help you brainstorm blog post ideas, write entire articles, create catchy social media posts, & even craft compelling product descriptions. The quality of the output is often so good that with a little human editing, it's ready to publish. A study even showed that GPT-4 performs at a human level on various professional and academic benchmarks, which is pretty impressive.
On-Page SEO: GPT-4 is a beast when it comes to on-page optimization. You can feed it a target keyword & a piece of content, & it will suggest ways to improve it. It can help with things like writing meta titles & descriptions, optimizing header tags, & ensuring your keyword density is on point.
Keyword Research: While not a dedicated keyword research tool, GPT-4 can be a great starting point for brainstorming. You can ask it for long-tail keywords, related terms, & even questions your target audience might be asking. However, it's important to remember that the base version doesn't have access to real-time search volume data, so you'll want to use it in conjunction with a tool like Ahrefs or SEMrush.
2. Google's Gemini: The Insider's Advantage
Gemini is Google's own LLM, & that alone should tell you something. It's deeply integrated with Google's ecosystem, which gives it a unique advantage when it comes to SEO.
Keyword Research & User Intent: This is where Gemini has a serious edge. Because it's part of Google, it has a deeper understanding of user intent & how people search. It can help you move beyond simple keywords & focus on the "why" behind the search. This is crucial in today's SEO landscape where understanding user intent is everything.
Content Strategy: Gemini can help you develop a more strategic approach to your content. It can analyze the SERPs for a given keyword & tell you what kind of content is ranking, what topics are being covered, & where there might be gaps that you can fill.
Data Analysis: If you're a data nerd like me, you'll love Gemini's integration with Google Sheets. You can use it to analyze large datasets from Google Search Console, identify trends, & get actionable insights without having to manually sift through endless rows of data.
3. Anthropic's Claude 3: The Technical Analyst
Claude 3 might not have the same household name recognition as GPT-4 or Gemini, but it's a powerhouse when it comes to technical tasks & handling large amounts of information.
Technical SEO Audits: This is where Claude 3 really stands out. While it can't crawl a website on its own, you can feed it data from a crawl tool like Screaming Frog, & it will analyze it for you. It can help you identify technical issues like broken links, redirect chains, & problems with your robots.txt file. It's particularly good at prioritizing these issues based on their potential impact on your rankings.
Schema Markup & Structured Data: Claude 3 is a champ at generating schema markup. You can give it a piece of content, & it will create the appropriate JSON-LD script for you. This is a huge time-saver & can help you get those coveted rich snippets in the search results.
Log File Analysis: For the truly advanced SEOs, Claude 3 can even help with log file analysis. You can upload your server logs, & it will help you understand how search engine bots are crawling your site, identify any crawl budget issues, & find opportunities for optimization.
Putting the LLMs to Work: A Task-by-Task Breakdown
Now that we have a better understanding of the key players, let's look at how you can use them for specific SEO tasks.
Content Creation: From Ideation to Publication
Content is still king in the world of SEO, but creating high-quality, engaging content consistently is a major challenge. This is where LLMs can be a game-changer.
Brainstorming: Stuck for ideas? Just ask an LLM! You can give it a broad topic, & it will generate a list of blog post ideas, subtopics, & even catchy headlines. GPT-4 is particularly good at this, thanks to its creative flair.
Outlining: Once you have an idea, you can use an LLM to create a detailed outline for your article. This will help you structure your content logically & ensure you cover all the important points. Gemini, with its focus on user intent, can be really helpful here in making sure your outline addresses the questions your audience is asking.
Drafting: This is where things get really interesting. You can actually use an LLM to write a first draft of your article. Now, I'm not saying you should just copy & paste the output & hit publish. It's crucial to edit & refine the content, add your own insights & expertise, & make sure it aligns with your brand's voice. But using an LLM to get that initial draft down can save you a TON of time.
Repurposing Content: LLMs are also great for repurposing existing content. You can take a long-form blog post & ask an LLM to turn it into a series of social media posts, a script for a YouTube video, or even an email newsletter. This is a fantastic way to get more mileage out of your content.
Keyword Research: Uncovering Hidden Gems
Keyword research is the foundation of any successful SEO strategy. But the days of just targeting high-volume keywords are long gone. Today, it's all about understanding the nuances of how people search & finding those long-tail keywords that indicate a strong intent to buy.
Seed Keyword Generation: All three of the big LLMs can help you generate a list of seed keywords to start your research. Just give them a topic, & they'll spit out a bunch of ideas.
Long-Tail Keyword Discovery: This is where LLMs can be particularly helpful. They can help you find those longer, more specific keywords that your competitors might be overlooking. Gemini, with its deep understanding of search behavior, is especially good at this.
Search Intent Analysis: This is a big one. You can use an LLM to analyze a keyword & understand the intent behind it. Is the user looking for information? Are they ready to make a purchase? Understanding this will help you create content that's perfectly aligned with their needs.
Keyword Clustering: LLMs can also help you group related keywords together into clusters. This is a great way to organize your content strategy & create topic clusters that demonstrate your expertise to Google.
Technical SEO: Lifting the Hood & Fixing What's Broken
Technical SEO can be intimidating, but it's absolutely crucial for ensuring your website is accessible to both users & search engines. LLMs can be a huge help here, especially for those who aren't super technical.
Site Audits: As I mentioned earlier, Claude 3 is a rockstar when it comes to analyzing technical SEO audits. You can feed it a crawl report, & it will break it down for you in plain English, telling you what's wrong & how to fix it.
Structured Data Generation: This is a task that used to require a developer, but now you can do it with an LLM. All of the big three can generate schema markup for you, which can help you get those eye-catching rich snippets in the search results.
Robots.txt & .htaccess Files: Need to create or edit your robots.txt or .htaccess file? An LLM can help with that too. Just tell it what you want to do, & it will generate the code for you. But be careful here – it's always a good idea to have a developer double-check the code before you implement it.
Link Building: AI-Powered Outreach & Analysis
Link building is one of the most challenging aspects of SEO, but it's also one of the most important. The good news is that AI is making it a whole lot easier.
Prospecting: You can use LLMs to find relevant websites to reach out to for backlinks. Just give it a keyword or a topic, & it will generate a list of potential targets. There are also a growing number of AI-powered link-building tools like Pitchbox & LinkDR that can help with this.
Personalized Outreach: The key to successful link building is personalized outreach. No one likes getting a generic, templated email. LLMs can help you craft personalized outreach emails that are much more likely to get a response. They can analyze a prospect's website & suggest specific things to mention in your email.
Guest Post Ideation: If you're doing guest posting as part of your link-building strategy, you can use an LLM to brainstorm topic ideas that are a perfect fit for the target website.
User Engagement: The Overlooked SEO Signal
User engagement signals like dwell time, bounce rate, & click-through rate are becoming increasingly important for SEO. If users are coming to your website & then immediately leaving, it's a sign to Google that your content isn't very good. This is where AI can help in a big way, especially when it comes to chatbots.
Here's the thing about websites – they can be a bit of a one-way conversation. You put all this effort into creating amazing content, but you don't always know if it's resonating with your audience. An AI chatbot can change that.
Think about it: a user lands on your site with a specific question. Instead of having to search through your entire site to find the answer, they can just ask a chatbot & get an instant response. This is a MUCH better user experience, & it keeps them on your site longer.
This is where a platform like Arsturn comes in. It helps businesses create custom AI chatbots that are trained on their own data. This means the chatbot can provide instant, accurate answers to customer questions 24/7. It's like having a super-helpful employee who never sleeps.
But it's not just about answering questions. A well-designed chatbot can also proactively engage with visitors, ask them questions, & guide them to the information they're looking for. This can have a HUGE impact on your user engagement metrics, which in turn can give your SEO a nice boost. For businesses looking to generate leads, a chatbot can be a game-changer. Arsturn helps businesses build no-code AI chatbots trained on their own data to boost conversions & provide personalized customer experiences. It's a pretty cool way to turn your website from a static brochure into an interactive, lead-generating machine.
The Future of AI in SEO: What to Expect
So, what does the future hold for AI in SEO? Well, one thing's for sure: it's not a passing fad. AI is here to stay, & it's only going to become more integrated into our workflows. Here are a few things I think we can expect to see:
More Predictive SEO: AI will get better at predicting search trends & algorithm updates, which will allow us to be more proactive with our SEO strategies.
Hyper-Personalization: AI will enable us to create even more personalized experiences for our users, from the content they see to the way they interact with our websites.
The Rise of AI-Powered SEO Suites: We're already seeing this with tools like Surfer SEO & MarketMuse, but I think we'll see even more all-in-one SEO platforms that are powered by AI.
So, Which LLM Should You Choose?
At the end of the day, there's no single "best" LLM for SEO. The right choice for you will depend on your specific needs & the tasks you're trying to accomplish.
If you're focused on content creation & on-page SEO, GPT-4 is probably your best bet.
If you want to get a deeper understanding of user intent & keyword research, Gemini is a great choice.
And if you need help with technical SEO audits & analysis, Claude 3 is a fantastic option.
Honestly, the best approach is to experiment with all of them & see which one works best for you. Most of them have free versions or trials, so there's no reason not to give them a shot.
I hope this was helpful in demystifying the world of AI & SEO. It's a really exciting time to be in this industry, & I can't wait to see what's next. Let me know what you think in the comments below