Choosing AI Tools — Find the Right One for You

The first wall you hit when you think "I want to try an AI tool" is the problem that "there are so many kinds, I don't know which to pick." In this chapter, we'll sort the major AI tools into four categories and hand you a map so you never get lost — covering each one's personality, what you can do for free, and how to choose by goal.

The AI tool landscape — know the 4 categories

Relax. As of March 2026, the major AI tools split into four broad categories. You don't need to memorize them all. Simply knowing which category what-you-want-to-do falls into makes choosing a tool far easier.

According to Fortune Business Insights, the global AI market is expected to reach about $514.5 billion in 2026. That said, the tools ordinary users reach for every day are concentrated in the four categories above. Even if it feels like "too many options," it's enough to just pick one category that matches your goal. For an overview of tools you can start with for free, see our roundup of how to use free AI tools.

ChatGPT vs Claude vs Gemini — the personalities of the big three chat AIs

Among chat AIs, the three with especially large user bases are ChatGPT, Claude, and Gemini. You might think "aren't they all the same?" — but in fact each has a distinct personality. Picture three excellent colleagues, each strong in a different area.

ChatGPT — the versatile all-rounder

Developed by OpenAI, it's the spark that lit the generative-AI boom. Since its release in November 2022, it has been the most-used chat AI: in 2025 its weekly active users topped 750 million, holding about a 68% share of the chat-AI market (Similarweb, January 2026).

Situations where ChatGPT fits:

• First-time AI users — it knows a lot and reassuringly answers something to almost any question
• You also want image generation — being able to say "make an image like this" within a conversation is a ChatGPT-only strength
• You want a wide range of uses — you can extend features with GPTs and plugins

Pricing includes a free plan, plus Go ($8/month), Plus ($20/month), and Pro ($200/month) (as of March 2026). The free plan already offers basic conversation and image generation (with usage limits), so starting here is the classic move.

Claude — the master of reasoning and writing

An AI assistant developed by Anthropic. It holds up "helpful, harmless, and honest" as its design philosophy, and specializes in long-form processing and logical thinking.

Situations where Claude fits:

• Writing and analyzing long text — for reports, papers, proposals, and other substantial writing, Claude is dependable
• Logical analysis — it produces coherent answers when organizing complex problems or doing comparative analysis
• Programming — consistently top-class on coding-assistance benchmarks. It also offers Claude Code, a tool for developers
• Document analysis via file attachment — you can upload PDFs or text files and have it analyze the contents

Pricing is a free plan, Pro ($20/month), and Max ($100/$200/month). The free plan has usage limits but is plenty to experience Claude's writing ability. For anyone who thinks "I want AI to write long text" or "I want it to think carefully," I'd suggest trying Claude first.

Gemini — the king of Google integration

An AI developed by Google, its biggest strength is integration with the Google ecosystem. Being able to use it in tandem with Gmail, Google Docs, Sheets, and more is a major advantage the other two lack.

Situations where Gemini fits:

• Researching the latest information — the tie-in with Google Search is unbeatable. Strong on real-time information
• You use Google services often — once you've experienced the convenience of AI right inside Gmail or Docs, you can't go back
• You want to analyze video content — it also has a feature to summarize YouTube videos

Pricing is a free plan, AI Pro ($19.99/month), and Ultra ($124.99 for 3 months, roughly $42/month). The free tier is relatively generous, and you can start right away as long as you have a Google account.

So which should you choose?

Honestly, "try them all and use the one you like" is the optimal answer. All three are free to try, so there's no reason not to. Still, for those who want a first step, here's the rough summary:

The mainstream style in 2026 isn't "narrow down to one" but using multiple tools depending on the goal. Write with Claude, search with Gemini — more and more people work this way. For a deeper comparison of the three models, see Which to choose: ChatGPT, Claude, or Gemini.

How far can you get on the free plans?

You often hear "won't the free plan just hit its limits right away?" There is a difference from the paid plans, sure, but the 2026 free plans are more capable than you'd imagine. If you want to compare the three services' free tiers in detail, see ChatGPT, Claude, and Gemini free-plan comparison too.

What you can do on the free plans

Feature	ChatGPT Free	Claude Free	Gemini Free
Text conversation	◯ (usage limits)	◯ (usage limits)	◯ (usage limits)
Image generation	◯ (limited)	✕	◯ (limited)
File attachment	◯	◯	◯
Web search	◯	△ (limited)	◯
Available models	Mostly GPT-4o mini	Sonnet (mid-tier)	Mostly Gemini Flash
Rough message limit	Tens per day	Tens per day	Tens per day

For everyday use — drafting emails, polishing text, quick lookups — the free plans are perfectly sufficient.

This much on the free plan alone — 5 real examples

Even when told "you can use it for free," it can be hard to picture what you can actually do. Here are some tasks you can handle on the free plan alone:

1. Drafting a business email — just type "Write an apology email to a client about a project delay. The cause was a system outage, and it'll be fixed by next Friday," and a polite message is done
2. Summarizing meeting notes — paste bullet-point notes and ask "turn this into minutes; make the decisions and to-dos clear"
3. Translating and replying to English emails — paste an English email and request "translate it into English, and write me a reply along these lines"
4. Outlining presentation material — give it the theme and ask "plan a slide structure for a 10-minute presentation. Include the key points for each slide"
5. Spreadsheet formula help — small technical questions like "give me a formula that automatically derives the day of the week from the dates in column A"

These are all tasks that any service's free plan can handle without trouble. Simply handing the "slightly annoying" chores of daily work to AI can save you a lot of time.

When to consider a paid plan

Here are the situations where a paid plan earns its keep:

• You keep seeing "you've reached your limit" messages — once you start using it heavily for work, the free tier isn't enough
• You want the highest-performance model — Claude Opus 4.8 on Claude, or each company's latest top model on ChatGPT and Gemini. Top-tier models step up a level in accuracy and creativity
• You want to do image generation seriously — when the free usage limits aren't enough
• You want to process long documents at once — paid plans let you use a longer context window (how much the AI can read at once)
• You want to use it as a team — business plans come with team-management and security features

Price comparison — how much per month?

Service	Free	Cheapest personal	Standard personal	Higher tier
ChatGPT	◯	Go $8/mo	Plus $20/mo	Pro $200/mo
Claude	◯	Pro $20/mo	Max $100/mo	Max $200/mo
Gemini	◯	AI Pro $19.99/mo	—	Ultra ~$42/mo

* Pricing as of March 2026. Local-currency amounts vary with exchange rates.

The key is to switch only after you feel for yourself that "it's worth paying." There's no need to rush at all. Use the free plan for a week or two first, and decide once you can see your own usage patterns. ChatGPT's Go plan ($8/month) is just right for people who think "the free tier isn't enough, but $20 is steep."

Let's try image-generation AI

In Chapter 1 we learned the types of AI, and image-generation AI is one of the fields that has advanced most remarkably across 2025–2026. Just type "a small café with a red roof, on a rainy day" and an image of that scene is generated — the experience is surprisingly fun once you actually try it.

For beginners, ChatGPT image generation is best

If you're trying image-generation AI for the first time, ChatGPT's image-generation feature is the top recommendation. The reason is simple: you can "create images while chatting."

For example:

1. "Make a watercolor-style illustration of a Paris café" → an image is generated
2. "Make the colors a bit warmer" → a revised image appears
3. "Add a cat to the terrace seating" → it's revised further

The process of homing in on your ideal image through dialogue is far more intuitive than specialized tools. Since ChatGPT's image generation was significantly upgraded in March 2025 (GPT-4o native image generation), the quality has reached a level professional creators acknowledge.

For quality, Midjourney

Midjourney stands head and shoulders above the rest for "artistry." Its distinctive aesthetic and beautiful finish are its appeal, and many professional designers and illustrators swear by it. Available from $10/month, operated through a web app. Using the "style reference" feature, you can even mass-produce a cohesive set of images that reference the style of an existing image.

That said, you can't "revise while chatting" the way you can with ChatGPT. It takes some skill in writing prompts (instructions), and English instructions are the norm.

For flexibility, Stable Diffusion

Stable Diffusion is an open-source image-generation model, and if you install it on your own PC you can generate images for free and without limit. You can even train your own style using a technique called LoRA. However, it requires a decent GPU (graphics card) and technical know-how.

Lately, GUI tools like ComfyUI and Forge UI have matured, making it easier to use than before. It suits people who want to "make lots of images without spending money" or "do fine-grained customization." For recommendations by use case, we compare in more detail in Best image-generation AI tools 2026.

Things to watch out for when using image-generation AI

Image-generation AI has advanced remarkably, but there are caveats:

• Copyright — the copyright of generated images is handled differently by country and service. For commercial use, check each service's terms
• The risk of fake images — generating images that resemble real people raises ethical problems. Each service sets restrictions
• Training-data concerns — there is also criticism of models being trained on existing artists' works

We cover these issues in detail in Chapter 5, "AI risks and ethics."

The world of coding AI

If you just thought "programming has nothing to do with me," hold on a second. The advance of coding AI matters not only to programmers but to every businessperson.

That's because, thanks to coding AI, an era where "even people with no programming experience can build an app" is beginning. A McKinsey survey (2024) reported that development teams that adopted coding AI saw their productivity rise by up to 55%.

GitHub Copilot — your partner inside the editor

Provided by GitHub and Microsoft, it's the most widely used coding AI. It runs inside code editors like VS Code, suggesting "the code you should write next" as you're writing.

For example, just write a function name and it suggests the whole body, or write a comment and it generates the corresponding code. Pricing is a free plan (limited), $10/month for individuals, and $19/month for business (as of March 2026).

Cursor — the AI-first editor

Cursor is a code editor designed from the ground up around "collaboration with AI." It's based on VS Code, but AI dialogue is at the center of the editor. Just instruct it in natural language — "find the bug in this file," "add this feature" — and it proposes and applies code changes spanning multiple files, all at once.

Pricing is a free plan (limited), Pro $20/month, and Business $40/month. It's spreading rapidly among programmers and was featured as a tool to watch in the 2025 Stack Overflow Developer Survey. For details on how to use it, see What is Cursor.

Codex — the cloud-based autonomous coding agent

A cloud-based coding agent that OpenAI released in May 2025. Give it a task, and in a sandbox environment in the cloud it autonomously writes code, runs tests, and, when done, submits a pull request (a proposed code change). As of March 2026, its weekly active users exceed 2 million (per OpenAI).

Because it's included in ChatGPT Plus ($20/month), you can use it at no extra cost. It's especially powerful in situations like "I want work to progress in the background" or "I want to hand off routine code writing." The CLI tool is also released as open source.

Claude Code — the AI engineer that runs in the terminal

A CLI tool for developers provided by Anthropic. You can ask Claude to code directly from the terminal (command line), and it autonomously handles reading and writing files, Git operations, and running tests. Its core model is the company's flagship Claude Opus 4.8 (2026), which posts top-class scores on SWE-bench (a coding-ability benchmark).

Whereas Codex works asynchronously in the cloud, Claude Code is distinctive for advancing work through real-time dialogue in your local environment. In fact, this very site (AI Arte) is itself developed using Claude Code. It's available with Claude Pro ($20/month). If you want to seriously learn coding AI, our sister course "AI Coding in Practice" systematically explains everything from getting started to mastering it.

Even with no programming experience, you can put AI to work

Coding AI is a tool for specialists, but chat AIs (ChatGPT, Claude, Gemini) also have powerful coding-assistance features. Even without programming knowledge, you can use them like this:

• Creating spreadsheet macros — ask "write a macro that tallies each month's sales data by department," and it makes code you can just copy and paste
• Building web pages — "make the HTML and CSS for a simple self-introduction page," and you get a page you can publish as-is
• Cleaning up data — things like "write a Python script that extracts only the Tokyo rows from this CSV data"
• Automation scripts — automating routine tasks like "a script that backs up the files in a folder at a set time every day"

In other words, coding AI isn't just for programmers — it's a tool with value for everyone who wants to "make work easier with a bit of automation." Once you pick up the prompting skills you'll learn in Chapter 3, you'll be able to wield it even more effectively.

If you want to seriously get into programming, check out the AI-agent topics in Chapter 6 too. Coding AI is the fastest-evolving field right now.

Recommended tools by goal — choose with a flowchart

For those who read this far and felt "that's too much information!", we've prepared a quick-reference table you can work backward from your goal. Find the tool that matches what you want to do.

The recommended way to start

Honestly, trying ChatGPT is the safest first step. Being the versatile type, it can cover almost every use — chat, image generation, search, coding assistance — with a single service.

From there, Claude when you think "I want higher-quality writing," Gemini when you want "Google integration," Perplexity when you want to "research with sources" — gradually building up your repertoire this way is the most stress-free way to proceed.

Don't forget AI search engines

Finally, one word about a category that's easy to overlook. The AI search engines typified by Perplexity are tools that dramatically change the efficiency of research.

With traditional Google search, you had to open the result links one by one and pull the information together yourself. AI search engines analyze information across multiple sites and generate an answer complete with sources. Just ask "tell me the latest information about X," and they research across everything from academic papers to news articles and answer for you.

Perplexity is plenty usable even on the free plan, so do give it a try. It'll change how research feels.

Summary — "just try one" matters more than the perfect tool choice

In this chapter, we introduced the four categories of AI tools. To recap:

• Chat AI (ChatGPT / Claude / Gemini) — the versatile type. Start here
• Image-generation AI (ChatGPT / Midjourney / Stable Diffusion) — for creating visual content
• Coding AI (Copilot / Cursor / Codex / Claude Code) — for streamlining development
• AI search engines (Perplexity / Gemini) — dramatically improving the quality and speed of research

What matters is not to hold back thinking "I'll start once I've found the optimal tool." Any tool takes just minutes to start, and if it doesn't fit, you just switch to another. Rather than aiming for the perfect choice, try one first — that's the shortest route to putting AI to work.

In the next chapter, we'll learn "the art of prompting," which greatly influences the quality of AI output. Whichever tool you choose, results change dramatically depending on how you use it — and we get to the heart of that "how."

References

• Similarweb / First Page Sage, "AI Chatbot Market Share 2026" (January 2026)
• Fortune Business Insights, "Artificial Intelligence Market Size" (2026, market size $514.5 billion)
• McKinsey Global Institute, "The State of AI: How organizations are rewiring to capture value" (2024)
• Panto, "AI Coding Assistant Statistics" (2025, 84% of developers use AI coding tools)
• Official sites: ChatGPT / Claude / Gemini / Perplexity