ChatGPT, Claude, and Gemini are the three AI assistants most people actually choose between, and all three cost about the same — roughly $20 a month for the main paid plan. That makes the choice a question of fit, not price: what you do most, which tools you already use, and which limits you will hit first.
This comparison is built from the three companies’ own pricing pages and help centres, as read in October and November 2026. Prices, limits, and model names change often, so treat the figures below as dated at publication and check the pricing page before you pay for anything. It compares documented features and limits by task; it does not claim benchmark testing, and it does not declare a single overall winner — because the right answer depends on the work.
The short answer
- ChatGPT is the broadest all-rounder. Unlimited everyday text chats on the free plan, and the paid plan bundles images, voice, deep research, and a coding agent in one app.
- Claude is the strongest for long writing and coding. Its free plan includes the capable Sonnet model, a very large context window, and no ads — but its usage limits are the tightest.
- Gemini is the best value for Google users. Deep Research and image generation are on the free plan, and the paid plan puts Gemini inside Gmail and Docs with 5 TB of storage.
If you only need one sentence: pick ChatGPT for breadth, Claude for writing and code, and Gemini if you live in Google Workspace.
How much does each plan cost?
All three have a free plan and a main paid plan at about $20 a month. The details below are US list prices from the companies’ pricing pages in October 2026.
| Tier | ChatGPT (OpenAI) | Gemini (Google) | Claude (Anthropic) |
|---|---|---|---|
| Free | $0 | $0 | $0 |
| Low-cost plan | Go, $8/month | Google AI Plus, $4.99/month | None |
| Main paid plan | Plus, $20/month | Google AI Pro, $19.99/month | Pro, $20/month, or $17/month billed annually |
| Heavy-use plans | Pro, $100 or $200/month | AI Ultra, $99.99 or $199.99/month | Max, $100 or $200/month |
Two differences matter. First, Claude has nothing between free and $20 — there is no budget tier, while ChatGPT Go is $8 and Google AI Plus is $4.99. Second, none of the three publishes a fixed message count for its chat app, so “how much can I use” is governed by rolling windows and fair-use rules, not a number you can compare directly.
What do you get on the free plans?
The free plans are good enough for a lot of everyday work, but each company draws the paywall in a different place.
| Free plan | ChatGPT Free | Gemini (free) | Claude Free |
|---|---|---|---|
| Model | Luna, OpenAI’s lightest model | Flash-Lite | Sonnet and Haiku |
| Chat limits | Unlimited everyday text chats, subject to abuse guardrails | Compute-based limits, refreshed every 5 hours up to a weekly cap | Session-based limit, resets every 5 hours |
| Context window | 27K tokens in Instant (about 12 pages of input) | 32K tokens | Up to 1M tokens, varies by model |
| File uploads | 3 a day | Up to 10 files per prompt; 100 MB per file | Up to 20 files per chat, 500 MB each; PDFs up to 1,000 pages |
| Deep research | Limited | Yes | No — Research starts on Pro |
| Image generation | Limited | Yes, with image editing | No — Claude makes no images |
| Ads | May appear on Free and Go | None described | None — Anthropic has committed to keeping Claude ad-free |
The pattern is clear. ChatGPT’s free plan is the most generous for plain chatting: unlimited everyday text chats. Gemini’s free plan is the most generous for features: Deep Research and image generation are included. Claude’s free plan has the strongest default model and the biggest context window, but the tightest usage limits — you will hit the five-hour session cap sooner than you will hit ChatGPT’s or Gemini’s limits.
One practical consequence of the context windows: a long document that spans several files may not fit in ChatGPT Free’s 27K-token window or Gemini Free’s 32K window, while Claude Free can hold far more. If your work is long documents, that difference matters more than any other free-plan feature.
What does the $20 plan get you?
| Main paid plan | ChatGPT Plus ($20) | Google AI Pro ($19.99) | Claude Pro ($20, or $17 annually) |
|---|---|---|---|
| Context window | 54K tokens in Instant; 256K in reasoning | 1M tokens | 1M tokens |
| Models | Stronger models with adjustable thinking | Full model range, including video generation | Full model range including Opus |
| Deep research | Yes | Yes | Yes |
| Image and video | Images and voice included | Built-in video generator — the only one of the three | No image or video generation |
| Ecosystem | Broad app integrations | Gemini inside Gmail and Docs; 5 TB of storage | Connectors and file creation |
| Extra | Coding agent included | 5 TB storage included | Claude Code access |
At $20, the choice is no longer about price at all. ChatGPT Plus is the broadest single app — images, voice, deep research, and a coding agent. Claude Pro gives the best coding and writing experience at that price, but makes no images or video and measures usage in five-hour sessions. Gemini through Google AI Pro is the value pick for Google users, with Gemini inside Gmail and Docs, the only built-in video generator of the three, and 5 TB of storage.
Which assistant fits which task?
Writing and editing
Claude is the usual pick for long-form writing. Its large context window holds a whole draft, it handles nuance and tone well, and its free plan already runs the Sonnet model. ChatGPT is close and more versatile — it can also generate the images to go with the text. Gemini is capable but shines less here unless the writing lives in Google Docs, where its integration saves steps. For prompt technique that works across all three, our ChatGPT prompts guide teaches the method — a clear role, the context, and the output shape — rather than a trick for one app.
Coding
Claude Pro is the strongest choice for coding work at the $20 tier, with Claude Code and a large context window that holds multi-file projects. ChatGPT Plus answers with a built-in coding agent and unlimited everyday chat. Gemini is a solid third choice, especially for developers already using Google Cloud. On the free plans, the context window is the deciding factor: a bug that spans several files will fall off the end of ChatGPT Free’s 27K-token window or Gemini Free’s 32K window, while Claude Free can hold it.
Research
Gemini wins on the free plan — Deep Research is included, and it is the only free plan of the three that offers it. ChatGPT offers limited deep research for free and the full version on Plus. Claude’s Research starts on Pro, so free Claude users do not get it at all. Whichever you use, verify the answer: our ChatGPT for work guide shows how to check AI output before relying on it, and that habit matters more than which assistant you pick.
Everyday questions and productivity
ChatGPT Free is the easiest default: unlimited text chats, web search, projects, and a study mode. Gemini is equally capable for Google users, with Guided Learning, quizzes, and flashcards. Claude is the quietest option — no ads, and a cleaner interface — but you will hit its session limit sooner. For students weighing the free plans, our free AI tools for students guide compares the wider field, including the limits that matter for study.
Images and video
This is the clearest split. ChatGPT generates images; Gemini generates images and, on a paid plan, video; Claude generates neither. If your work needs visuals, Claude is not the tool, however good its writing is.
Privacy and ads
Claude has committed to keeping the assistant ad-free, and its free plan carries no ads. Gemini’s free plan has no ads described on its pricing page. ChatGPT may show labelled, sponsored ads below a response on the Free and Go plans. All three let you control chat history and memory in settings, and all three warn that your conversations may be used to improve the service unless you opt out — check the data controls in whichever app you choose, and do not paste confidential work material into any of them without reading those settings first.
How the usage limits actually work
None of the three publishes message counts, which makes the limits hard to compare — but the shapes differ:
- ChatGPT: free and Go have unlimited everyday text chats, with separate limits on uploads, image generation, voice, data analysis, and other tools. Plus can still be capped at busy times, according to its help page.
- Gemini: free use refills every 5 hours until a weekly limit is reached. Paid plans multiply the limits.
- Claude: free and Pro measure usage in five-hour sessions with a weekly ceiling, and Pro and Max can buy usage credits to keep going.
In practice, that means ChatGPT is the hardest to exhaust for plain chatting, while Claude and Gemini both meter you on a five-hour clock. Heavy users who hit the limits will find all three sell $100 and $200 tiers: Claude Max is the pick for all-day coding, ChatGPT Pro for all-day research and voice, and Google AI Ultra for the deepest Google integration.
What about AI agents?
All three companies are moving toward assistants that do more than answer — they take actions, use tools, and run multi-step tasks. Our AI agents explainer covers what an agent actually is, how it differs from a chatbot, and why permissions and human oversight still matter. The comparison in this article is about the chat assistants themselves; agent features change even faster than the chat features, so treat any agent claim as dated the moment you read it.
How to choose
Work through these questions in order:
- What do you do most? Writing and code point to Claude; images, voice, and research point to ChatGPT; Google Workspace work points to Gemini.
- How long are your documents? If you regularly work with long files, Claude’s context window matters most.
- Do you need images or video? If yes, Claude is out.
- Do ads bother you? If yes, Claude or Gemini, not ChatGPT Free.
- Are you already paying for Google storage or Microsoft 365? Google AI Pro’s 5 TB of storage changes the value calculation if you would pay for storage anyway.
- Try the free plans first. They are genuinely usable, and a week of real work on each will tell you more than any comparison — including this one.
The bottom line
There is no single best AI assistant. ChatGPT is the broadest, Claude is the strongest writer and coder, and Gemini is the best value inside Google’s ecosystem. The free plans are all usable, the paid plans all cost about $20, and the real differences are the context window, the image and video tools, the ecosystem, and where the usage limit bites. Pick by the work you do most, try the free plan first, and re-check the pricing page before you pay — these products change monthly.
