If you run a local business, working out how to choose the right LLM for your business can feel impossible. You tried ChatGPT, it helped, and then you started seeing ads for Claude, Gemini, Copilot, and Grok everywhere. Now you are stuck. Which one do you pick? Do you pay for one, or all of them? Is the free version good enough?

Here is the good news. You do not need to test all five for a month each. You need a simple way to match the tool to how you already work. That is what this guide gives you.

We will keep the jargon out of it. By the end you will know which AI assistant to start with, whether to pay, and how to confirm your choice in about a week.

What an LLM Even Is (in Plain English)

LLM stands for “large language model.” It is the engine inside the AI chat tools you have been hearing about. When you type a question into ChatGPT and it writes you an email back, an LLM is doing the work.

For a small business owner, the practical version is this: an LLM is a smart assistant you talk to in plain English. It can draft emails, summarize a long document, write social posts, clean up a spreadsheet, and answer questions. The five names you keep seeing are just different companies offering their own version of that assistant.

The five worth knowing in 2026 are ChatGPT, Claude, Gemini, Microsoft Copilot, and Grok. Let us look at each one and what it costs.

The Five Main Options, and What They Cost

Prices and model names below are accurate as of July 2026. This is the one area where you should always double-check on each company’s own pricing page before you pay, because these companies change plans often.

ChatGPT, Made by OpenAI

ChatGPT is the one most people have tried. It has a free version, and the main paid plan, ChatGPT Plus, costs $20 a month according to OpenAI’s pricing page as of June 2026. Paid users run OpenAI’s flagship GPT-5.5 model, while the free tier runs the GPT-5.3 model. For a deeper walkthrough of one of its best features, see our guide on ChatGPT Projects for small business.

Claude, Made by Anthropic

Claude is known for careful writing and handling long documents. It also has a free version, and Claude Pro costs $20 a month, per Anthropic’s pricing page, as of June 2026. Anthropic lists Claude Opus 4.8 as its most capable model, with a faster model called Sonnet on the free tier.

Gemini, Made by Google

Gemini is built into Google’s world. Google’s subscription page lists a free version, a Google AI Plus plan at $4.99 a month, the more popular Google AI Pro plan at $19.99 a month, and Google AI Ultra starting at $99.99 a month, all as of July 2026. The free app runs a fast Gemini Flash model, and paid plans add the more capable Gemini Pro model. For a closer look at the Google Workspace route, see our guide to Google Gemini for small business.

Microsoft Copilot, Made by Microsoft

Microsoft Copilot lives inside Microsoft Office. Microsoft’s pricing page shows that Microsoft 365 Copilot Chat is included at no extra cost for people who already have an eligible Microsoft 365 subscription, as of June 2026. The fuller version that works inside Word, Excel, Outlook, and Teams is the Microsoft 365 Copilot Business add-on, which costs $21 per user per month on an annual plan (or $25.20 month to month) for businesses with up to 300 users, on top of your existing Microsoft 365 license. Microsoft says Copilot runs on the latest OpenAI GPT-5 models. For the full breakdown, see our review of whether Microsoft Copilot is worth it for small business.

Grok, Made by xAI

Grok is the newest of the group and is tied to X, formerly Twitter. According to xAI’s pricing page, it has a free tier and a standalone SuperGrok plan that costs $30 a month as of June 2026. Grok also comes bundled into a paid X subscription. It runs xAI’s Grok 4 family of models. For an honest look at when Grok’s real-time X data earns a place in a local business, see our review of Grok for business.

Notice the pattern. Three of the five general chatbots land right around $20 a month for their main paid plan, and every one of them has a free version you can start with today.

Free vs the $20 Plan: What You Get for Paying

Before you choose a brand, decide whether you even need to pay yet.

The free versions are genuinely useful. You can draft emails, brainstorm, summarize a page of notes, and answer everyday questions without spending a cent. For a business owner who uses AI a few times a week, free is often enough to start.

Paying around $20 a month buys you four things: access to the smarter, more capable model, higher daily limits so you do not get cut off mid-task, faster responses during busy hours, and extra features like deeper research and file handling. The rule of thumb: if AI saves you even one hour a week, a $20 plan pays for itself many times over. But there is no reason to pay on day one. Start free, and upgrade the day the free limits start slowing you down.

Step One: Start With the Tools You Already Use

This is the shortcut most guides skip, and it removes most of the guesswork. The best AI for your business is often the one that already lives inside the software you open every morning.

If your business runs on Microsoft 365 (Word, Excel, Outlook, Teams), Microsoft Copilot is the natural fit. It works inside the apps you already pay for and can see your own emails and files when set up.
If your business runs on Google Workspace (Gmail, Google Docs, Google Sheets), Gemini is the natural fit. It is built into those same apps.
If you use neither, or a mix of everything, you are free to pick the best standalone chatbot. For most owners that is ChatGPT or Claude.

Starting from your existing tools means the AI fits into your day instead of becoming one more login to remember.

Step Two: Match the Tool to Your Main Job

Once you know your software world, narrow it down by the single task you most want help with. Here is a simple way to think about it.

Everyday writing and general help. ChatGPT is the safe default. It is the most widely used, has the most how-to guides online, and handles a little of everything well.
Long documents, contracts, and careful writing. Claude is the strong choice. It is good at reading long files and writing in a natural, less robotic tone.
Anything inside Gmail, Docs, or Sheets. Gemini wins because it is already there.
Anything inside Word, Excel, Outlook, or Teams. Copilot wins for the same reason.
Real-time and trending topics, or social media tied to X. Grok is built around live information from X, so it leans into current events.

Most local businesses do not need more than one of these. Pick the one that matches your biggest recurring task, and ignore the rest until you have a reason to revisit.

Step Three: Test Drive Before You Commit

You can confirm your pick in about a week without spending anything. Here is the method.

Choose the two free versions that came out on top from the steps above.
Take one real task you do often, such as replying to a common customer email or writing a weekly promotion.
Paste the exact same request into both tools.
Compare the answers. Which one sounded more like you? Which needed less editing?
Use the winner for a week on real work, then decide whether to upgrade to the paid plan.

Real tasks beat feature lists every time. The tool that saves you the most editing on your actual work is the right one, no matter which brand has the flashiest launch video.

Common Mistakes Owners Make

A few patterns trip people up when they first choose an AI tool.

Paying for all five at once. That is roughly $100 a month for tools you will not have time to learn. Pick one. Master it. Add a second only if you find a clear gap.

Choosing on hype instead of workflow. The model that tops a benchmark chart this month may not be the one that fits your Tuesday. Your software and your tasks matter more than the leaderboard.

Ignoring the free tier. Many owners pay before they need to. Run free until the limits get in your way.

Forgetting basic privacy. Do not paste customer financial details, passwords, or anything you would not email, unless you are on a business plan with data protections. Check each tool’s settings before you load in sensitive files.

Frequently Asked Questions

Which LLM is best for a small business?

There is no single winner for every business. As of June 2026, ChatGPT is the safest starting point for general use because it is the most popular and the easiest to find help with. But if you live in Microsoft Office, Copilot fits better, and if you live in Google Workspace, Gemini fits better. Match the tool to the software you already use and the task you do most.

Is the free version of ChatGPT or Claude good enough?

For many owners, yes, at least to start. The free versions of ChatGPT, Claude, and Gemini can draft emails, summarize notes, and answer everyday questions at no cost as of June 2026. Upgrade to a paid plan only when you start hitting daily limits or need the smarter model for harder work.

Do I need to pay for more than one AI tool?

Almost never at the start. One tool that matches your workflow will cover the large majority of what a local business needs. Adding a second makes sense only when you find a specific task your first tool handles poorly.

Is Microsoft Copilot worth it for a small business?

It depends on whether you already run on Microsoft 365. Per Microsoft’s pricing page, Microsoft 365 Copilot Chat is included free with an eligible Microsoft 365 subscription as of June 2026, so you can try the basics at no extra cost. The fuller Copilot Business add-on, at $21 per user per month on an annual plan for up to 300 users, is worth it mainly for teams that work inside Word, Excel, Outlook, and Teams all day.

Which AI is best for customer service replies?

Any of the major chatbots can draft customer replies well. The trick is less about the brand and more about the setup. Give the tool your brand voice and a few of your best past replies, and it will sound like you. Our ChatGPT Projects guide shows one simple way to do this.

Try This Today

Pick the one task you do most often that involves writing, such as a common customer email or a weekly social post. Open the free version of two AI tools from this guide. Paste the exact same request into both. Read the two answers side by side and keep the one that sounds more like you and needs less editing.

That single comparison, which takes under 15 minutes, will tell you more than any review. You will walk away knowing which assistant to build your routine around.

If you would rather not sort through this alone, that is what an AI coaching session is for. We look at how you really run your business, pick the right tool for your workflow, and set it up with you so you leave with something working, not a to-do list.

How to Choose the Right LLM for Your Business