Why is ChatGPT so expensive? Where $20 goes

Why is ChatGPT so expensive?

ChatGPT costs $20 a month because every answer runs on large models and costly data-center chips, and OpenAI still spends far more than it earns. Reported audited figures put its 2025 revenue at $13.1 billion against about $34 billion in costs. The higher plans, up to $500, charge heavy users closer to what their use costs.

If the $20 feels like a markup on something cheap, the numbers point the other way. OpenAI loses billions a year, investors cover the gap, and new plans keep arriving at the top of the price ladder.

What it costs OpenAI to answer you

Every reply is computed fresh on specialized chips in a data center, a step the industry calls inference. The model reads your whole conversation, then writes the answer a few characters at a time. A long chat costs more than a short one, because the model rereads everything before each reply. Reasoning modes cost more again: the model writes out a long chain of working you never see, and the chips run for every word of it.

The bill is large and growing fast. Leaked Microsoft documents, reported by Ed Zitron and covered by The Register in November 2025, put OpenAI's inference spending on Azure at about $8.7 billion in the first nine months of 2025, more than double the roughly $3.7 billion it spent in all of 2024. OpenAI has not confirmed those figures. They fit what the company says in public: more users, longer chats and more reasoning all mean more compute.

Training sits on top of serving. Each new model takes months on large clusters of chips, and Epoch AI estimated in October 2025 that research and training took most of OpenAI's compute budget in 2024.

Is OpenAI profitable?

No. When it closed its latest funding round on 31 March 2026, OpenAI said it was earning more than $2 billion a month. Its audited 2025 accounts, obtained by Ed Zitron and examined by the Financial Times in June 2026, show how far costs still run ahead of that.

Source: audited financial statements obtained by Ed Zitron (Where's Your Ed At) and examined by the Financial Times, June 2026. OpenAI publishes no regular accounts, so treat these as reported figures.

The headline net loss for 2025 was about $38.5 billion, but most of the jump came from a non-cash accounting charge tied to OpenAI's change of structure. The Financial Times estimated that, with that charge and other non-cash items stripped out, OpenAI burned about $8 billion in cash in 2025.

Heavy users cost the most. When ChatGPT Pro launched at $200 a month in December 2024, Sam Altman posted on 5 January 2025: "insane thing: we are currently losing money on openai pro subscriptions!" and added that "people use it much more than we expected."

Who pays for the losses

Investors pay. OpenAI's largest primary rounds:

• October 2024: $6.6 billion at a $157 billion valuation.
• March 2025: $40 billion at a $300 billion valuation, led by SoftBank.
• March 2026: $122 billion at an $852 billion post-money valuation, closed on 31 March 2026. OpenAI announced the first $110 billion in February, at a $730 billion pre-money valuation. Amazon ($50 billion, of which Bloomberg reported $35 billion depends on an IPO or a technical milestone), Nvidia ($30 billion) and SoftBank ($30 billion) wrote the largest cheques, and almost $3 billion came from individual investors through banks (Bloomberg; SiliconANGLE, 31 March 2026).

Microsoft has put in more than $13 billion since 2019 and holds about 27% of the for-profit company. Investors at an $852 billion valuation are buying a share of future growth, and OpenAI has started down the road to selling shares in public: on 8 June 2026 it confirmed it had confidentially submitted draft IPO paperwork to the SEC. It said then that it had not decided on timing.

How a nonprofit came to sell a $500 plan

It was OpenAI, the company, that began as a nonprofit. ChatGPT arrived seven years later.

Sources: OpenAI's structure page; TechCrunch, 28 October 2025; SiliconANGLE, 31 March 2026; PBS NewsHour, 8 June 2026; OpenAI's Codex pricing documentation, October 2026.

Each change came back to the cost of computing power. When OpenAI created the capped-profit company in March 2019, it said it would need to invest billions of dollars in cloud compute and staff over the following years. The 2025 restructure turned the capped-profit company into a public benefit corporation that TechCrunch described as able to raise money "without legal restraint" (28 October 2025). The California and Delaware attorneys general allowed it to go ahead after securing conditions, including measures on teen safety in California's case.

The new structure also shapes who OpenAI answers to: investors who put in $122 billion at an $852 billion valuation expect revenue to keep growing, and the newer plans reach for that growth at both ends, with ads on the $8 Go plan and new Pro tiers at $100 and $500.

Why ChatGPT Pro now costs $100, $200 or $500

A flat monthly price works when most subscribers use roughly the same amount. The heaviest users break that, as Altman's January 2025 post showed, so OpenAI now sells usage in steps. The $100 and $200 tiers get the same features with different allowances (OpenAI's "About ChatGPT Pro tiers" help page). The $500 tier, announced at DevDay on 29 September 2026, adds the largest allowance and Ultrafast mode for GPT-6 Astra, which runs up to eight times faster in ChatGPT Work and Codex (OpenAI's help center and Codex documentation, October 2026).

Faster output takes more hardware per answer, and the fastest mode sits on the most expensive plan. Ultrafast lives in ChatGPT Work and Codex, so the $500 plan is aimed at people running long coding and work jobs all day.

What each ChatGPT price buys

Source: OpenAI's pricing page, captured 11 October 2026 (US prices checked 3 October 2026). Every plan has unlimited everyday text chats, subject to OpenAI's abuse guardrails. Context is in tokens: 27K is about 12 pages, 54K about 40. On every plan OpenAI can use your chats for training unless you opt out.

Free and Go run the same smaller models, and Go mostly buys a longer context window within a chat. Plus is the first step to OpenAI's top models and the step that removes ads, but in the default Instant mode it holds the same 54K as Go; you need reasoning mode for the 256K window. Pro is the only plan with a longer Instant window, and it mostly buys volume and speed.

I think ChatGPT's free plan is good, and you can't complain about free. What it lacks is the bigger models and the room for a long working session.

Is $20 worth it?

For ChatGPT Plus, my rule: pay if you program, if your work pays for it, or if you use it professionally. If you use AI for personal things, or a little for work, you don't need to pay.

Switching brand at $20 rarely saves money. Claude Pro is $20, Google's AI Pro is $19.99, Perplexity Pro is $20 and Microsoft 365 Premium, which carries Copilot's paid features, is $19.99. Plus set that price in February 2023, and the other labs' main plans have sat at or near it since.

Cheaper plans exist because smaller, efficient models cost far less to run. For scale, the two open-source models I use for everyday chat through my own pay-per-use account cost me $18.90 between them for the month to 15 September 2026, as a very heavy user. Plainly, which the team runs at $5 a month, is built on that kind of model: it runs one capable open-source model and switches when a better one comes out. Google AI Plus at $4.99, Plainly at $5 and ChatGPT Go at $8 sit at the bottom of the cross-vendor price ladder, and efficient open models from Chinese labs are a large part of why that end of the ladder exists. Whether prices keep falling is covered in will AI get cheaper.

What these numbers can't tell you

OpenAI publishes no per-user cost, so nobody outside the company can say whether a typical Plus subscriber makes or loses it money. The finance figures above come from leaked or reported documents, and the cost per answer moves every time a new model or chip arrives. Treat the direction as solid and the exact numbers as reported.