What ChatGPT actually costs.

ChatGPT has a free tier, two subscriptions, and a pay-per-use API — and most people aren't sure which they need or what a prompt really costs. Here's the honest breakdown, with real August 2026 numbers.

01 The plans

Update — September 4, 2026: the $200 plan just got a reason to exist. OpenAI announced GPT-6 Astra on September 3, and in ChatGPT it lands as GPT-6 Pro — a metered model, not an unlimited one. Per OpenAI’s Help Center: Pro $200 gets 200 messages a week (plus a separate 170/day for GPT-5.6 Sol Pro, capped at 200/day combined); Pro $100 gets 50 a week shared between the two Pro models; Business Premium 50 a week and Business Standard 15 a month, both shared; Enterprise is admin-enabled and off by default. Plus is not included in Chat, so $20 still buys GPT-5.6 Sol, not GPT-6. Extra usage is sold as credits. If you were weighing Plus against Pro, the honest question is now “how many GPT-6 messages a week would I actually use?” — the full breakdown is in GPT-6 Astra: who actually gets it.

Update — August 16, 2026: it shipped. The Free tier’s biggest cap is gone. OpenAI’s own Free Tier FAQ now reads: “Free users have unlimited everyday text chats, subject to abuse-prevention safeguards.” Free (and Go) run on GPT-5.6 Luna by default, and the Think button for harder questions is now live too — available in the mobile app (open the + menu and select Think) and rolling out on the web, so if you don’t see it yet on desktop, check your phone. Free also includes web search, file and image uploads, image creation, data analysis, existing GPTs, and Library with 500 MB of storage — each with its own separate cap. That, not message count, is now the real line between Free and Plus: Plus buys higher rate limits on the metered things, not the right to send another message.

And one thing $20 no longer buys. As of August 2026, OpenAI’s help documentation states that new GPT creation and publishing are not available on any personal account — Free, Go, Plus or Pro. Building and publishing GPTs moved to Business, Enterprise and Edu workspaces. Existing GPTs still work and their creator can still edit them. If “I want to build my own GPT” was your reason to upgrade, it isn’t one any more — what that changes, and what to use instead.

The jump from Plus to Pro is 10×, and most people don't need it — Pro is for heavy, all-day use of the most expensive reasoning models. Inside the apps you're not billed per word; you get generous-but-capped usage measured in messages.

Update — August 18, 2026: “no ads” is now a paid feature. OpenAI started testing ads in ChatGPT in the United States in February 2026, expanded to eight further markets over six months, and on August 18 announced ChatGPT Ads is expanding to 31 European countries the following week — among them Germany, France, Spain, Italy, Sweden, Norway, Denmark, the Netherlands and Austria. The line that matters on this page: ads are shown only to people on the Free and Go plans. Plus, Pro and Enterprise remain ad-free. OpenAI states that conversations are kept private from advertisers, customer data is not sold, ads are clearly labelled and separated from ChatGPT’s answers, and advertising does not influence the answers themselves. Advertisers reach it through OpenAI’s ads team and partners for now; self-service via Ads Manager is slated for later this summer.

02 Pay-per-use (the API)

If you build with ChatGPT or want the model without the subscription, the API charges per token (~¾ of a word). Current flagship rates as of the July 30, 2026 price cuts, per million tokens (input / output):

Output is priced far higher than input — that's normal across every provider, because generating text is the expensive part.

03 What a prompt actually costs

• Quick question (~250 in / 350 out): well under a cent.
• Summarize a 2-page doc (~800 in / 1,200 out): about $0.02 on GPT-5.6 Terra — and a fraction of a cent on Luna.
• Analyze a long report (~2,500 in / 3,500 out): roughly $0.05–$0.06.

04 Which is right for you?

• Try-it / occasional: Free tier is genuinely useful — and with text chats going unlimited in August 2026, more useful than it has ever been.
• Daily driver: Plus ($20) — the sweet spot for almost everyone.
• All-day power user / advanced reasoning: Pro ($200) only if you'll actually use it.
• Builder / automating: API — pay only for what runs.