How AI Has Become the Algorithm (2026 Guide)
For years, businesses were told AI was a tool you could choose to use, a way to write faster or design quicker, sitting neatly alongside the algorithm as an optional extra. That distinction has quietly disappeared. In 2026, on the platforms that matter most, AI is not sitting beside the algorithm anymore. It is the algorithm.
In 18 years running Optimise Your Marketing from Cromford Mills in Derbyshire, I have watched this shift happen faster than almost any other change in marketing. East Midlands businesses who still think of AI purely as a content-writing shortcut are missing the bigger story: the systems deciding whether anyone ever sees that content are now AI systems themselves.
This post expands on a point I made in our guide to how algorithms fit into every part of the BIG12: understanding AI is now a prerequisite for understanding how anything gets ranked or recommended. Here is the evidence.
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You do not need to take this on faith. Three of the biggest platforms in the world have each, independently, rebuilt their core ranking system around AI within the last year, and each has confirmed it publicly.
LinkedIn: 360Brew
LinkedIn's entire ranking system now runs on 360Brew, a 150-billion-parameter transformer model trained specifically on LinkedIn's own data. It is not a set of rules with AI assistance bolted on, it is a single model making the ranking decision end to end, covering everything from profile credibility to content quality classification.
X: the Grok-powered rebuild
In January 2026, X replaced its legacy recommendation system entirely with a Grok-powered transformer model, ranking posts with steep, AI-driven engagement weighting rather than the older rules-based approach.
Google: generative AI inside Search itself
Google is folding generative AI directly into Search, not as a separate feature but as a layer running through AI Overviews and AI Mode, summarising and increasingly answering queries directly on the results page using its own generative models.
Three of the biggest platforms in the world did not add AI to their algorithm. They replaced the algorithm with AI. That is a very different, and much bigger, shift than most marketing advice has caught up with. Stuart Baddiley, Optimise Your Marketing
Why This Changes What "Understanding the Algorithm" Means
When the ranking system was rules-based, you could learn the rules: post at this time, use this many hashtags, hit this word count. When the ranking system is a large AI model trained on genuine quality and relevance signals, the old checklist approach stops working nearly as well, because the model is assessing something closer to genuine value than a fixed set of surface signals.
This is exactly why content built purely to satisfy a checklist increasingly underperforms content built with a genuine point of view, across nearly every platform we cover in this series. The models are getting better at telling the difference, and that gap is only going to widen.
When a Derbyshire firm stopped optimising for rules that no longer applied
A professional services client across the East Midlands was still following a content checklist built for the algorithms of two years ago. We rebuilt their approach around genuine depth and originality instead, assuming AI-driven ranking systems on every major platform they used. Combined organic reach across LinkedIn and Google grew by more than 45% within two months.
See how we approach AIHow This Connects to the BIG12 Framework
AI now runs directly through Algorithms, Social Media, SEO and Google in the BIG12, which is exactly why we treat it as its own pillar rather than a feature of any single one. Our related guides to the LinkedIn algorithm and the X algorithm both show this same AI-first pattern in practice. Derbyshire businesses who understand AI as the underlying infrastructure, not just a content tool, are the ones adapting fastest. We cover this properly in our online marketing training, and in our wider guide to where algorithms fit into every part of the BIG12.
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Knowing that AI now runs the ranking system on LinkedIn, X and Google is the easy part. Actually rebuilding a content strategy around genuine depth and originality, rather than a checklist built for a system that no longer exists, is where most Derbyshire and East Midlands business owners run out of time.
That is the gap we close. In 18 years of applying the BIG12 for UK SMBs, the businesses staying visible through this shift are never the ones chasing the newest AI tool, they are the ones who understood early that the algorithm itself had changed.
If your content strategy still assumes the rules of two years ago, it is worth finding out how much that is costing you right now.
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