The Big Players: ChatGPT, Claude & Gemini
Lesson 2.1 — The Big Players: ChatGPT, Claude, Gemini & Grok
Estimated reading time: 12 minutes
You've probably heard the names: ChatGPT, Claude, Gemini, Grok. Maybe a colleague mentioned one, maybe you saw a news story, maybe you're just curious what all the fuss is about. This lesson cuts through the noise and tells you exactly what each one is, who built it, and when you'd actually want to use it.
The short version: they're all AI assistants you can chat with, but they have different strengths, different personalities, and come from different companies with different goals. Choosing between them is less like choosing between Coke and Pepsi, and more like choosing between different types of expert help — a creative collaborator, a meticulous editor, a well-connected researcher, or a straight-talking contrarian.
At a Glance
| ChatGPT | Claude | Gemini | Grok | |
|---|---|---|---|---|
| Made by | OpenAI | Anthropic | xAI (Elon Musk) | |
| Website | chat.openai.com | claude.ai | gemini.google.com | grok.com |
| Free tier | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Paid tier | $20/month (Plus) | $20/month (Pro) | $20/month (AI Premium) | Included with X Premium |
| Best for | Creative work, coding, brainstorming | Long docs, careful writing, analysis | Real-time web info, Google Workspace | Current news, X/Twitter content, bold opinions |
| Web access | ✅ Yes (free & paid) | ⚠️ Limited | ✅ Yes (built-in) | ✅ Yes (real-time) |
| Image input | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Reads documents | ✅ Yes | ✅ Yes (very long docs) | ✅ Yes | ✅ Yes |
| Google Workspace | ❌ No | ❌ No | ✅ Yes (Gmail, Docs, Drive) | ❌ No |
| X/Twitter access | ❌ No | ❌ No | ❌ No | ✅ Yes (native) |
| Personality | Confident, helpful | Thoughtful, careful | Informative, integrated | Direct, witty, opinionated |
| Best first pick? | ✅ Great all-rounder | ✅ Especially for writing | For Google users | For X/Twitter users |
ChatGPT — The One That Started It All
Made by: OpenAI
Website: chat.openai.com
Free tier: Yes (GPT-4o mini with some limits)
Paid tier: ChatGPT Plus at $20/month
OpenAI launched ChatGPT in November 2022, and it became the fastest-growing consumer application in history — reaching 100 million users in just two months. That's not a coincidence. It was genuinely surprising to people who tried it. You could ask it a question in plain English, and it would answer in plain English, thoughtfully and at length. No special commands, no technical knowledge required.
ChatGPT is powered by models called GPT (Generative Pre-trained Transformer). The current flagship model is GPT-4o ("o" for "omni"), which can handle text, images, and audio. The free version gives you access to a capable version of this model, though with some usage limits. If you hit those limits, you're asked to upgrade or wait.
What ChatGPT is particularly good at:
- Creative writing — stories, scripts, poems, marketing copy
- Coding help — explaining, writing, and debugging code
- Brainstorming — generating lots of ideas quickly
- General-purpose question answering
- Working with images (you can upload a photo and ask questions about it)
A real example: You're writing a cover letter and stuck on the opening paragraph. You paste in your draft and say: "This opening feels stiff. Can you rewrite it to sound more human and enthusiastic?" ChatGPT will give you three or four variations, each with a slightly different tone. You pick the one that sounds most like you.
OpenAI also offers a more advanced paid option called ChatGPT Pro ($200/month) for professionals who need the most powerful models, and enterprise plans for businesses. But for most people starting out, the free tier or Plus is more than enough.
Claude — The Thoughtful One
Made by: Anthropic
Website: claude.ai
Free tier: Yes (Claude Sonnet with daily limits)
Paid tier: Claude Pro at $20/month
Anthropic was founded in 2021 by former OpenAI researchers, including siblings Dario and Daniela Amodei, who left to focus specifically on AI safety — building AI that is helpful, harmless, and honest. Claude is their AI assistant, and that focus on safety and thoughtfulness shows in how it behaves.
Claude is named after Claude Shannon, the mathematician who founded information theory. Fitting, given that Claude tends to be precise, careful, and good at handling complex information.
The current model family is called Claude 3.5/3.7, and the version you'll interact with on the free tier (Claude Sonnet) is genuinely impressive — not a cut-down demo version.
What Claude is particularly good at:
- Long documents — Claude can read and analyse very long texts (up to around 200,000 words in one go)
- Writing quality — tends to produce nuanced, well-structured prose
- Following complex instructions carefully
- Explaining difficult concepts clearly
- Being honest about what it doesn't know
A real example: You have a 40-page PDF report from your company's board meeting and need to summarise the key decisions and action items. You paste the whole thing into Claude and ask: "Summarise the key decisions from this report, and list any action items by department." Claude reads it all and gives you a clear, organised summary in minutes.
One thing users consistently notice about Claude is that it feels more careful and considered than some alternatives. It's less likely to just make something up, and more likely to say "I'm not certain about this" when it isn't. Some people find that reassuring; others occasionally find it more cautious than they'd like.
Gemini — Google's Entry
Made by: Google DeepMind
Website: gemini.google.com
Free tier: Yes (Gemini 1.5 Flash)
Paid tier: Google One AI Premium at $20/month (includes Gemini Advanced)
Google had been doing AI research for years before ChatGPT came along — in fact, the transformer architecture that underlies most modern AI was invented at Google. But they were slow to put a consumer product out, partly because they had a lot to lose (their search business). When they finally launched Gemini (originally called Bard), it was rough around the edges. They've improved significantly since.
What sets Gemini apart is its integration with Google's ecosystem. If you use Gmail, Google Docs, Google Drive, or Google Calendar, Gemini can work with all of that. Ask it to summarise your emails from a specific sender, or draft a document based on notes in your Drive.
What Gemini is particularly good at:
- Searches and real-time information (it's connected to the web)
- Integration with Google Workspace
- Multimodal tasks — it handles text, images, audio, and video well
- Long context (the 1.5 Pro version can handle up to 1 million tokens)
A real example: You ask Gemini "What are the top AI tools released in the last month?" It doesn't just answer from training data — it searches the web and gives you up-to-date results with sources. This is something ChatGPT and Claude can also do, but Gemini does it particularly smoothly because it's built into Google's search infrastructure.
The weakness is consistency — some users find Gemini less reliable on pure writing or reasoning tasks compared to ChatGPT or Claude. It's best when you want current information or Google integration.
Grok — The Straight-Talking Newcomer
Made by: xAI (Elon Musk's AI company)
Website: grok.com
Free tier: Yes (with limits)
Paid tier: Included with X (Twitter) Premium ($8–16/month)
Grok launched in 2023 and has grown quickly, particularly among people who already use X (formerly Twitter). It's built and maintained by xAI, founded by Elon Musk after he left OpenAI's board. The name comes from science fiction — "grok" means to understand something deeply and intuitively.
What makes Grok stand out is its real-time access to X/Twitter and its deliberately more direct, less filtered personality. Where Claude might say "I'm not sure about that," Grok is more likely to give you an answer and let you decide. Some people love this; others prefer the caution of Claude or ChatGPT.
What Grok is particularly good at:
- Real-time information — it's connected to the web and X, so it knows what's happening right now
- Current events and news, including what's trending on social media
- Direct, no-nonsense answers without excessive hedging
- Image generation (built in via Aurora image model)
- Analysing posts and trends from X/Twitter
A real example: You want to know what people are actually saying about a new product launch — not just the press releases, but the real reactions. Grok can pull from live X posts and give you a genuine picture of public sentiment in real time.
Worth knowing: Grok's personality is intentionally more willing to engage with edgy or controversial topics than its competitors. This can be useful for getting direct answers, but it also means you should apply the same critical thinking you'd use with any AI.
Who it's best for: People already on X Premium who want an AI with live news access and a more direct communication style. Also worth trying if you want a second opinion from a model with a different "personality" to Claude or ChatGPT.
What About the Others?
These three get most of the attention, but they're not the only options.
Perplexity AI (perplexity.ai) is worth knowing about. It's less of a general assistant and more of a research tool — everything it tells you comes with sources you can check. If you're a student, a journalist, or anyone who needs to verify information, Perplexity is excellent. We'll cover it more in Lesson 2.6.
Microsoft Copilot is powered by OpenAI's models but built into Microsoft's products (Word, Excel, Teams, Bing). If you're deep in the Microsoft ecosystem, it might be the most convenient option.
Meta AI is built into WhatsApp, Instagram, and Facebook. It's useful if you're already in those apps and want a quick AI chat without opening a new browser tab.
Which One Should You Start With?
Key takeaway: If you can only start with one, pick Claude or ChatGPT — both have strong free tiers and are great all-rounders. Add Gemini if you're deep in Google's ecosystem, or Grok if you're already on X Premium and want real-time news access and a more direct style. Most people who use AI regularly end up trying all four and choosing by task.
Don't stress too much about this choice. In the next lesson, you'll set up accounts for both — and switching between them for different tasks is perfectly normal. Most people who use AI regularly don't have a single favourite; they choose based on the task.
What matters right now is that you try one, get comfortable with it, and start seeing what it can actually do for your work and life. That's what the rest of this module is about.
Up next: Lesson 2.2 walks you through setting up your free accounts for ChatGPT and Claude, step by step.