ChatGPT vs Claude vs Gemini: Which Assistant for Which Job

Three AI assistants lead the field: ChatGPT, Claude and Gemini. All three can write, summarise, explain and code. The differences that matter are in their style, how deep they go, how cautious they are, what they connect to, and where each one struggles.

This article walks through those differences so you can choose sensibly, or know when to use more than one.

What you're actually comparing

Each of these apps runs on a family of AI models, and which model answers you depends on your plan, and sometimes on the task. Free plans get smaller or more limited models; paid plans unlock the best ones.

So "ChatGPT is smarter than Gemini" (or the other way round) is rarely true across the board. It depends on which model is answering. What stays the same is each app's overall approach, how it behaves by default, and the other products it connects to.

ChatGPT

OpenAI's ChatGPT is the most widely used AI assistant. Its strengths are range, built-in tools and a big collection of custom GPTs and connected apps.

The free tier gives limited use of current OpenAI models, with web search and image generation. Paid plans raise the usage limits and unlock the more capable models, including reasoning modes; the top individual plan is aimed at people who use it all day. Plan names and prices change often, so check OpenAI's pricing page (opens in a new tab) before deciding.

Where it does well:

• Range. ChatGPT handles all sorts of requests, from coding and writing to data analysis and maths, without much setting up.
• Built-in tools. Web search, image generation, running code and reading files all work in the same chat.
• Personalisation. Custom GPTs and memory let you shape an assistant that remembers how you like things done.
• Structured output. Its models are good at returning answers in an exact format, such as a table or data a program can read, which matters for developers using the API.

Where it falls short:

• The free plan's limits show up quickly for anything beyond quick tasks.
• Answers can be wordy, with cautious filler phrases that add nothing.
• OpenAI changes its models often, so something that worked one way may behave differently after an update.

Claude

Anthropic's Claude was built with a strong focus on safety, and it's widely used for writing, coding and working through long documents.

The free tier includes web search, file uploads and image understanding, with a usage cap that resets every few hours. Paid plans (Pro, and Max for heavier use) raise those limits and add features such as Claude Code. Check Anthropic's pricing page (opens in a new tab) for current prices and limits.

Where it does well:

• Long documents. Give Claude a dense research paper, a legal contract or a large codebase and it tends to keep track of all of it. That's what many people choose it for.
• Writing style. Claude's writing is usually cleaner and less padded than ChatGPT's. It avoids filler and follows style instructions closely.
• Careful thinking. For grey areas, such as ethical questions, detailed feedback on writing or sensitive topics, its caution is a strength.
• Projects. Projects keep your files and instructions across chats. That suits prompt chaining: work done in steps, where each step builds on the last.

Where it falls short:

• Fewer built-in connections to other apps than ChatGPT, though MCP connectors close much of the gap.
• Free plan limits reset every few hours, which can interrupt a long session.
• It's cautious by design, so it sometimes refuses or hedges on requests other assistants handle without fuss.

Gemini

Google's Gemini is built into Google's products: Gmail, Docs, Drive and Search. If your work runs on Google, that's its biggest advantage. If it doesn't, it hardly matters.

The free tier uses a lighter Gemini model and includes features such as Deep Research and Gemini Live voice conversations, with limits. Google's paid AI plans unlock the stronger models, higher limits and Gemini inside Gmail and Docs. Check Google's plans page (opens in a new tab) for current details: the plan line-up has changed several times.

Where it does well:

• Google apps. If your work lives in Gmail, Docs or Sheets, Gemini can work with them directly. Searching your inbox and Drive from inside the assistant saves real time.
• Images, audio and video. Gemini understands pictures, sound and video as well as text, and it's consistently strong at this on paid plans.
• Live search. Gemini can use current Google Search results, so it's more up to date than an assistant relying only on what it learned in training.
• Deep Research. Deep Research writes long research reports with sources, which is useful for checking out a company, studying competitors or reviewing what's been published on a topic.

Where it falls short:

• The free model is noticeably weaker at complex reasoning than the paid ones.
• For creative writing or long documents, its writing tends to be less polished than Claude's.
• It works best inside Google's world. If you don't use Google's products, you lose much of the point.

Comparison at a glance

Prices and limits change often, so check each provider's pricing page before subscribing.

Pick ChatGPT if…

• You want one tool for lots of different jobs, without switching apps.
• You want to create images in the same chat as your text.
• You build with OpenAI's API and want the same models in your everyday assistant.
• You want lots of connected apps and custom GPTs to choose from.

Pick Claude if…

• You often work with long documents, such as reports, contracts or codebases, and need it to stay sharp to the end.
• Good writing matters more to you than a long list of tools.
• You want careful handling of sensitive or unclear requests.
• You want to connect it to your own tools and data with MCP.

Pick Gemini if…

• Your work runs on Google, and you want an assistant that can read your Gmail and Drive.
• You often work with video, audio or images.
• Deep Research would be genuinely useful for your work.
• You already pay for Google's storage or Workspace plans, which may include Gemini features.

Using more than one

You don't have to pick just one. Many people use ChatGPT for quick tasks and coding, Claude for reading and analysing long documents, and Gemini for anything in Google's apps. With free plans on all three, it costs little to use each for what it does best.

The downside is that each tool keeps its own history, so switching means explaining your project again every time. If that bothers you, pick one as your main assistant and open the others only for specific jobs.

What to check before paying

• Which model the free plan gives you. None of the three gives free users its best model. Try the free plan on your typical tasks before paying for the upgrade.
• Usage limits and reset periods. Each product caps usage differently and resets on a different schedule, and the caps change. If you keep hitting limits mid-task, a higher plan may be worth it.
• Whether you need it to connect to other tools. If you need Gemini in Gmail, or Claude connected to your code through MCP, that narrows the choice quickly.
• Training on your conversations. All three let you opt out of having your conversations used to train their models. Check each one's privacy settings if this matters for your work.

You can see each one's listing on Ploba (ChatGPT, Claude, Gemini) and browse alternatives on Explore.