What are the cheapest paid AI subscriptions?

Among the big names, Google AI Plus costs $4.99 a month in the US and ChatGPT Go costs $8. Claude's cheapest paid plan is Pro at $20. Plainly costs $5 a month for unlimited chat.

Is ChatGPT Go worth $8 a month?

Go runs the same models as the free plan and may show ads. It doubles the default context to about 54K tokens (around 40 pages) and adds memory, scheduled tasks and more image generation. It doesn't include the stronger models that come with Plus.

What does ChatGPT Plus add over the cheaper plans?

Plus costs $20 a month and adds OpenAI's frontier models, including GPT-6.1 Sol and GPT-6 Astra, with no ads and full access to deep research. It suits people who program, use AI professionally or have work that pays for it.

Can I cancel a $5 AI subscription any time?

Yes. Plainly is a month-to-month subscription. Cancel from your account settings whenever you like, and your access continues to the end of the paid period.

Is a $5 AI subscription good enough? Yes

Q: Is ChatGPT free unlimited?

For everyday text chats, yes, subject to OpenAI's abuse guardrails. The limits sit elsewhere: the free plan runs the smaller GPT-6 Luna model, its default context holds about 27K tokens (roughly 12 pages), deep research and image generation are limited, and ads may show.

For everyday asking, yes. How $5 compares with free ChatGPT, Go at $8, Google AI Plus and the $20 plans, and the one thing $5 can't buy.

Is a $5 AI subscription good enough?

Yes, for everyday asking: questions, emails, plans, explanations and second opinions. A $5 plan handles all of that well. The one thing $5 can't buy is a frontier Western model, so if your work needs the best of Claude or ChatGPT every day, pay for a $20 plan or more.

What $5 buys next to free, $8 and $20

Prices are US, checked in October 2026 against OpenAI's pricing page, claude.com/pricing and Google's US Gemini plans page.

Plan	Per month	Per year	Everyday text chat	What you get
ChatGPT Free	$0	$0	Unlimited*	GPT-6 Luna, about 27K tokens of default context (around 12 pages), ads may show
Claude Free	$0	$0	Limit resets every five hours	Sonnet and Haiku, no ads
Google AI Plus	$4.99	$59.88	Higher Gemini limits than free	Google's Gemini models only, plus 400GB of Google storage
Plainly	$5	$60	Unlimited	One capable open-source model, web search with sources, documents and photos, no ads
ChatGPT Go	$8	$96	Unlimited*	Same models as Free, about 54K tokens of default context (around 40 pages), may show ads
ChatGPT Plus	$20	$240	Unlimited*	Adds GPT-6.1 Sol, GPT-6 Sol and GPT-6 Astra, no ads
Claude Pro	$20	$240	Five-hour and weekly limits	Opus, Sonnet and Haiku, plus Claude Code
ChatGPT Pro, Claude Max	$100 and up	$1,200 to $6,000	Unlimited* (ChatGPT) or 5× to 20× Pro (Claude)	Every model on that service, with the most capacity

*Unlimited subject to OpenAI's abuse guardrails.

The gap between $5 and the cheapest $20 plan is $180 a year. Over Go, it's $36.

How $5 compares with free ChatGPT and Claude

Free ChatGPT no longer caps everyday text chats. Its limits moved elsewhere. The free plan runs the smaller GPT-6 Luna model. Its default context holds about 12 pages, so a long task loses its early details. Deep research and image generation are limited, and ads may show. Claude Free has no ads and runs Sonnet, a strong model, but its allowance resets every five hours and heavy use runs it out.

For short questions, free ChatGPT is good, and you can't complain about free. The case for paying $5 is the long task and the ads. A $5 plan like Plainly keeps long chats working, reads documents and photos, searches the web and links the sources it used, and shows no ads.

How a $5 model did in a writing test

On 2 September 2026 I gave the same five everyday writing tasks to ChatGPT on the Go plan, Plainly and Fable 5, a frontier model. I scored each answer for filler, jargon and whether I'd send it, out of 15 per task.

	ChatGPT (Go, $8)	Plainly ($5)	Fable 5 (frontier)
Total, out of 75	61	61	59
Tasks won	Text message, restaurant review	Polite-decline email, the $5 question	None outright

The condense task was a tie. I didn't randomize which model was A, B or C, so read this as one person's scored test. Go runs the same models as ChatGPT's free plan, so the result says something about free ChatGPT on short tasks too. Ads appeared under three of the five ChatGPT answers I captured. Every answer is printed in the best AI for writing test.

On everyday writing, then, a $5-class model tied ChatGPT's cheap tier, and the frontier model scored no higher than either.

Why everyday AI can cost $5

Capable everyday AI is cheap to serve. My own bill shows it. I run a desktop chat app with my own OpenRouter key, a setup for technical people that charges per use. From 16 August to 15 September 2026, the two models I use for everyday chat, DeepSeek V4 Flash and GLM 5.3 Flash, came to $18.90 between them for the month. I'm a very heavy AI user.

That figure is evidence of serving cost and nothing more. It's one person's usage at retail API prices, with none of the costs of running an app or a company in it, so it doesn't compare like-for-like with any plan in the table above. It does show that the two open models carrying a very heavy month of everyday chat cost under $20 at retail rates. Why those models are so cheap to run is the subject of why Chinese AI models cost less.

A $5 app is built on the same economics. Plainly runs one capable open-source model and switches when a better one comes out. You never pick.

What $5 won't get you

There are no frontier Western models at $5. Claude's Opus and Fable and ChatGPT's Sol and Astra sit behind the $20 plans and above. For the hardest work, such as large coding projects or long specialist research, the gap is real, and those plans earn their price. If that describes most of your days, $5 is the wrong price point.

A $5 plan also leaves out features some people rely on. Plainly has no image or video generation, no memory across chats, no voice mode and no phone app. Google AI Plus includes Google's image and video tools; ChatGPT Go includes image generation.

Which AI subscription is the best value?

The best value is the plan that matches how much you use AI. My rule:

Use it a little: the $20 Claude plan. A light user rarely meets Claude's usage limits, so $20 buys frontier quality with little downside.
Use it a lot: the $5 Plainly plan. Heavy users hit Claude Pro's limits, as set out in how Claude Pro's usage limits work, and a flat unlimited plan takes that problem away.
Use it a huge amount: the $100 Claude or ChatGPT plan.

For ChatGPT Plus specifically, I'd pay only if you program, your work pays for it, or you use AI professionally.

The cheaper big-name plans are weaker buys. I'd call ChatGPT Go "a bad tier": you pay $8 and keep the ads, the small default context and the smaller model. On Go I hit the forgetting problem myself: mid-task, the chat lost things I'd told it earlier in the same conversation. The full case is in is ChatGPT Go worth it. Google AI Plus at $4.99 is "good, but you're tied to Google's models, and Google's models aren't currently state of the art." Its 400GB of storage is a real extra if you'd pay for storage anyway.

What to do next

Run a week of your ordinary questions through a $5 plan alongside what you use now, and compare the answers you'd keep. If you pay $20 now and the $5 answers hold up, the $20 plan was buying capacity you weren't using. If you keep reaching for the frontier, the $20 plan is earning its price. If a $5 price sounds too good, what the catch is with cheap AI goes through what you give up. Switching from ChatGPT covers what carries over if you move.