ChatGPT pricing: Free, Plus, and Pro with GPT-5.6

ChatGPT pricing now runs from a free plan to two Pro plans, from $0 to $200 a month (as of October 2026), and the models behind them come from the GPT-5.6 family, with GPT-6 Pro added on Pro, Business, and Enterprise. With $8, $20, $100, and $200 side by side, the question is which plan is the cheapest one you won't outgrow.

ChatGPT is OpenAI's chat assistant. The Help Center and plan pages list each plan's price and model access, and the choice comes down to which usage limit a plan runs into first.

ChatGPT plans and pricing at a glance

ChatGPT offers Free, Go, Plus, two Pro tiers, Business, and Enterprise, and the individual plans differ in usage limits and model access. Free and Go run on GPT-5.6 Luna, and Sol starts at Plus.

Business and Enterprise use the same models as the individual plans. The ChatGPT plans, prices, and models table below gives each plan's price, models, and intended users on one row.

ChatGPT plans, prices, and models (as of October 2026)

The first jump in capability is from Free or Go to Plus, where the model changes from Luna to Sol. The next jump is from Plus to Pro, which adds GPT-6 Pro and more usage, and Business and Enterprise sit beside that ladder because they change how a team pays and manages access rather than which models it gets.

What Free and Go include, and where they stop

Free costs $0 and runs on GPT-5.6 Luna by default, and Go at $8 a month runs on Luna as well. So the answer to "is ChatGPT free" is yes, with Luna as the model and usage limits that run in rolling time windows.

The default changed on August 6, 2026, when GPT-5.6 Luna replaced the earlier default for Free and Go users. Neither plan includes GPT-5.6 Sol, and logged-out visitors do not get Sol either.

Moving from Free to Go changes the price but not the model. Someone who asks a few everyday questions a week can stay on Free, while someone who needs Sol for hard reasoning has to move up to Plus.

GPT-5.6 Sol, Terra, and Luna: which model you get

GPT-5.6 is split into three durable tiers, Sol, Terra, and Luna, and each tier can be updated on its own schedule. The tiers divide the work this way:

• Sol is the flagship tier, for hard reasoning and long agentic work.
• Terra is the balanced tier, for everyday work.
• Luna is the fast, low-cost tier.

The number now names the generation, while Sol, Terra, and Luna name the tier within it. Before July 2026 the core ChatGPT lineup was GPT-5.5, and GPT-5.6 reached general availability across ChatGPT, Codex, and the API on July 9, 2026. Articles on the family are collected under GPT-5.6.

For plan choice, the useful detail is where each tier shows up. In a normal ChatGPT conversation only Sol is selectable, and it covers both Instant responses and the thinking options. Terra and Luna surface inside Work and Codex and are reachable through the API, while Free and Go chats run on Luna by default.

What Plus at $20 a month adds over Free

Plus at $20 a month is the first plan that includes GPT-5.6 Sol for regular use. It also comes with higher usage limits, the Work agent, and full Codex access.

Against Free, the difference is the model and the usage limit. Free runs on Luna inside rolling usage windows, while Plus moves daily chats to Sol, the flagship tier.

A person who keeps hitting the Free limit, or who needs Sol for hard reasoning, should move to Plus. A person whose Free chats never run into a window can keep Luna and stay on Free.

Plus still has usage limits. The exact numbers are set by OpenAI and have been revised before, so check the current plan at chatgpt.com/pricing before paying.

Pro at $100 or $200: who needs the extra headroom

Two Pro tiers sit above Plus, at $100 and $200 a month, and the sensible reasons to pay for one are the Plus usage limit and GPT-6 Pro. Pro raises the usage limit over Plus and adds one model.

GPT-6 Pro, built on GPT-6 Astra, is available on Pro $100, Pro $200, Business, and Enterprise, and Plus is not on that list. Someone who stays on Plus keeps Sol for regular work but does not get GPT-6 Pro. Both Pro tiers include it, so the model does not separate them.

Confirm on OpenAI's plan page how the $100 and $200 tiers differ before choosing between them, because usage limits change. Anyone who needs neither GPT-6 Pro nor more usage than Plus allows has no reason to move up.

Business and Enterprise: shared billing and admin control

Business and Enterprise use the same models as the individual plans, GPT-6 Pro included, so what a team buys is shared billing and pooled usage, not a different set of models. In practice, billing is shared, admins hold the controls, and usage is pooled across the team.

A team lead who buys seats for several coworkers gets one bill and one set of controls instead of separate personal subscriptions. The current Business price is at openai.com/business/pricing. Enterprise is quoted individually, so it has no list price to compare.

Which ChatGPT plan to choose by the limit you hit

Pick the cheapest plan whose limits you don't keep hitting. The plan follows from what has actually stopped the work so far:

• Free is enough if you have never hit a limit.
• Plus is the next step when you keep hitting Free limits or need Sol.
• Go runs on Luna like Free, so it adds no access to Sol.
• Pro, at $100 or $200, is for the case where Plus itself is the bottleneck, in usage or because GPT-6 Pro is needed.
• Business is for a team that needs admin control and pooled usage, and Enterprise covers the same needs at a price quoted by OpenAI.

That rule also settles whether Plus is worth paying for and whether Pro beats Plus. Plus is worth paying for once a Free limit has stopped the work or Luna falls short, and Pro is worth it over Plus when the Plus limit stops the work or GPT-6 Pro is needed.

Prepare long documents before you paste them in

Converting a web page to Markdown before pasting it into ChatGPT keeps its heading and table structure. Text copied from a web page can arrive without its heading and table structure, and a long page with many headings and tables has the most to lose.

When you want to paste a long web page, such as a report or help page, into ChatGPT, try a tool that converts the page to Markdown first. Headings and tables then arrive as plain Markdown, so ChatGPT gets the outline, not a flat block of text.

The sakuttoAI URL to Markdown tool fetches the page on its server and converts it in the browser. The page content is not sent to ChatGPT until you paste it.

Cautions before you subscribe

OpenAI revises pricing, model access, and usage limits often, so confirm the plan on OpenAI's plan page before paying. The core lineup moved from GPT-5.5 to GPT-5.6 in July, and the Free and Go default moved to Luna on August 6, 2026. Three checks help before paying:

• Open the plan page at chatgpt.com/pricing to confirm the current price and the models the plan includes.
• Check numbers and names in answers before relying on them, because a model can state a figure or a model name that is wrong.
• Check workplace rules before pasting confidential data, and treat important answers as drafts that a person confirms.