What can AI models do for a small business?
Every AI tool you have heard of runs on a model: the part trained by OpenAI, Anthropic, Google and the rest. It is the engine of the system, and it is the part you control least - you choose it, you pay for it, and then you work with what it can do.
The posts here help you choose well. Which AI model should a small business use? compares the main options for everyday jobs. Free or paid AI shows what really changes when you pay, from data terms to limits. What AI can't do for your business is the honest list of where models still fall over, so you never build a job on a weakness.
Once you have a model, the bigger gains come from what you put around it - that is harness engineering.
The makers publish what each model is for: Anthropic's model overview, OpenAI's model list and Google's Gemini models. Our posts turn those pages into a choice for your jobs.
3 guides to AI models
Every guide to AI models for a small business, newest first. Each answers one question owners ask, in plain English, and is drawn from the rules and checks we run on our own live systems.
- Which AI model should a small business use?ChatGPT, Claude or Gemini for a small business: how to choose by the tools you already use and one real job, not by launch headlines or benchmarks.
- What AI can't do for your business (yet)The honest limits of AI for a small business today: what it can't know, decide or be trusted with alone, and how to plan around each limit.
- Free or paid AI for business: what changes?Free AI plans vs business plans for a UK small business: who owns the account, what happens to your data, the limits you hit and the control you get.
Questions about AI models
The questions small business owners ask us most about AI models, each answered in a few lines with a link to the guide that goes deeper.
There is no single best model: the right one is the cheapest that does your job correctly every time. Most small businesses do well with a mid-priced model from a major maker for writing and sorting, and a stronger one only for hard reasoning. Try two on one real job and compare the results. Our guide to which AI model to use walks through the choice.
Free AI is fine for trying ideas, but most free plans let the maker use what you type and cap how much you can do. Paid business plans usually keep your data out of training, add admin controls and raise limits. Read the plan's data terms before you paste in customer details. Our free vs paid AI guide compares them.
Models cannot know facts they were never given, check their own work reliably, or take responsibility for a decision. They also guess when unsure, which is why answers can sound right and be wrong. Build jobs where the model drafts and something else checks. The full list is in what AI can't do for your business.
No. A new model is worth testing only if it does one of your existing jobs better or cheaper, measured on your own examples. If your instructions and checks sit outside the model, switching takes an afternoon, not a rebuild. That is the point of harness engineering, and our guide to keeping up without chasing launches gives a monthly habit.
A chat plan costs about the same per person as other monthly business software, and automated jobs are billed by use, often a few pounds a month for a small business. Costs rise with long documents and heavy use, so set a monthly spending limit on day one and review it after the first month. Our prices page shows what we charge to set it up.
This is general guidance, not legal or financial advice. For your own situation, speak to a qualified adviser.