Ep 4.3: Top 5 LLMs for Marketers

Top 5 LLMs for Marketers: Who Are They and What Do They Do Differently?

Genny: Good day, listeners.

This is the SEO Unfiltered podcast, although today, it’s more like LLM Unfiltered, because today we are going to look at the most popular LLMs available for use on the market. As you probably know, AI tools are taking the world by storm, whether we asked for it or not, which is to say, it seems like every major tech company is putting all their innovation eggs in the AI basket.

From social media to word processors to wearable technology to—yes—marketing platforms, AI is as ubiquitous as you can imagine. So today, here’s what we’re going to do. We’re going to break down the top 5 most popular large language models, or LLMs to help you listeners better understand which tools are the most appropriate for your marketing needs, because believe it or not, they’re not all the same.

So, in order to start this list, I think it’s important that we qualify what an LLM is, because as you might remember in the previous episode, there be tons of abbreviations floating around the AI alphabet soup and sometimes it’s hard to keep track of what it all means, also because technology moves so fast. For example, since our last episode in which we talked about all these endless names, a new term has become popular, and that is LLMO, or as I like to call it Elmo. Elmo stands for large language model optimisation, and focuses specifically on making your content visible in LLM-generated answers.

Now, to refresh your memory, a large language model is a type of advanced AI that is trained on a massive amount of text that allows it to process, understand, and generate human language, making it an ideal sidekick for businesses needing round-the-clock content generation, translation, customer service, and virtual assistance.

So, what are the top LLMs out there for marketers and what are they good for?

• ChatGPT 5 by OpenAI
• Gemini by Google
• DeepSeek
• Perplexity
• Claude by Anthropic

ChatGPT

The one we tend to mention quite a lot on this podcast is ChatGPT by OpenAI. Its latest generation, aptly named ChatGPT 5, is an all-around foolproof MVP that can do essential marketing, GEO, and SEO tasks like idea generation, content creation, schema markup, meta tag creation, email drafting, research, and so much more and at lightning speed.

Because it’s so versatile, you can have it on in the background so that it’s always ready to assist you.

What is it good for? Absolutely EVERYTHING! It’s totally multimodal, so go crazy!

Well to be more precise, we recommend marketers use ChatGPT for stuff like brainstorming ideas, creating short-term posts, generating structured data, and to some extent producing long-term content at scale with the caveat that it should always be proofread and edited by a human being. But, it can also produce images and code.

What do we use ChatGPT for at the office? Well basically, we all kind of use it as a virtual assistant. We use it to draft emails to clients and proofread our communication for clarity and tone. We use it to help us draft ads, as well as outline content pieces, and we also use it to deepen our understanding of complex topics because at Geeky Tech, our content team helps deliver landing pages for our highly technical clients. I can’t even tell you how many times I’ve had to prompt it to explain something to me like a five year old.

What are some tasks it’s probably not best for?

• It can still hallucinate and fail at basic maths, so if you’re using it to create tables or formulas, you’ll need to verify them. And because it can hallucinate, you’re better off not taking what it says at face value when it comes to YMYL topics.
• It’s also still a bit forgetful, so if you ask it to write long-form content, you’ll probably notice it rehash the same point throughout the page.
• It doesn’t always use live web search to answer questions, often relying solely on its training data.
• The quality of its answer depends heavily on the prompt. The more specific your input, the better the response.

Overwhelmingly though, OpenAI’s GPT tool is by far the most popular AI search engine for a reason. There’s pretty much zero learning curve to speak of, and its general attitude is one of helpfulness and positivity.

Gemini by Google

Gemini is a multimodal language model, which means that its output potential isn’t just restricted to text—it can create images, audio, video, and code. ChatGPT can do this too, but Gemini was built as a multimodal model from the start, giving it an edge in some areas like image processing.

Formerly known as Bard, its chatbot interface offers the same generative capabilities as ChatGPT. Gemini’s Go Live feature allows you to talk to it and receive voice answers.

If you’re deeply integrated with the Google ecosystem (Gmail, Docs, YouTube, etc.), Gemini is a helpful assistant. It’s also great for real-time research, PDF summarisation, and fact-checking. However, it may not be as creative as ChatGPT when it comes to producing marketing copy or ideas.

DeepSeek

China’s speedy and powerful contribution to LLMs, DeepSeek is well known for its efficiency, performance, and technical accuracy. It’s not ideal for marketers needing creative content, but great for logic-based tasks.

It’s a text-only model and doesn’t generate images or videos. But its structured output makes it a great choice for developers, coders, and spreadsheet or table work.

Perplexity

Perplexity is arguably the best research assistant and answer engine out there. It shines in sourcing and citing up-to-date, relevant information and showing how it arrived at its answers step-by-step.

It’s also more concise and professional in tone compared to ChatGPT, and its transparency about sources builds user trust. That said, it’s not always the most creative LLM.

Still, for factual accuracy, summarising data, and research-heavy tasks, Perplexity is extremely strong.

Claude by Anthropic

Claude is marketed as the safer, more human-like alternative to ChatGPT. It’s very expressive and suited for long-form, high-quality content like whitepapers and e-books.

Thanks to its Constitutional AI training, Claude aims to provide helpful, safe answers. It’s emotionally intelligent and adaptable to tone and style, but sometimes filters out nuance or content it deems risky.

It may not handle layered or abstract problems as well as others, and like all LLMs, quality depends on your prompts.

Final Thoughts

Technology evolves fast, and by the time you hear this episode, a lot could already have changed. But as of now, each LLM has its strengths:

• Use ChatGPT for versatile content and creative ideation
• Use Gemini for research, summarisation, and Google integration
• Use DeepSeek for logic-based or technical tasks
• Use Perplexity for thorough, sourced answers
• Use Claude for long-form, expressive content

There’s no one-size-fits-all answer, and using a mix of LLMs may be the smartest approach. Just remember: AI is here to assist, not replace, your creative brain.

Thanks for listening to this episode of SEO Unfiltered. Don’t forget to subscribe, leave a review, and visit us at geekytech.co.uk. Until next time, keep your content fresh—and your SEO strategies fresherer.

Peace!