What Do You Use AI For? Surprising Use Cases from 5ch

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The story

A thread titled “Tell me what you use AI for” popped up on the 5ch forums, pulling in a wide range of answers — from proofreading text and app development, to building a tool that auto-generates video continuations in a local environment, to scripts that automate office work. Practical examples came up too, like polishing English emails or researching foreign economies to inform investment decisions, and discussion of what differs between the free and paid tiers — but one comment, “isn’t ‘semi-automating office work’ just bookkeeping in the end?”, sparked disagreement over what should even count as "automation."

What people said

1AnonymousOct 8, 2026 21:38
I want to try all sorts of things too.
Right now it's proofreading work documents
and simple app development
3AnonymousOct 8, 2026 21:40
Writing erotic fiction
10AnonymousOct 8, 2026 21:43
Re: #3
Not erotic, but I did have it turn a bunch of plot outlines I'd stockpiled into an actual story
6AnonymousOct 8, 2026 21:42
Had it build me a tool that continues videos in a local environment
You feed it a video and instructions, and it continues it exactly as told
15AnonymousOct 8, 2026 21:45
Re: #6
Wow, you can actually do that
Never would've imagined it

This is exactly the kind of use I wouldn't have thought of myself
9AnonymousOct 8, 2026 21:43
Is everyone paying for a subscription?
11AnonymousOct 8, 2026 21:44
Re: #9
Right now I'm trying ChatGPT Plus ("Chappy," 5ch slang for ChatGPT) free for a month
12AnonymousOct 8, 2026 21:44
I have it semi-automating my office work
19AnonymousOct 8, 2026 21:47
Re: #12
Isn't that basically just bookkeeping?
13AnonymousOct 8, 2026 21:44
Never tried anything erotic — don't want ChatGPT ("Chappy") thinking I'm a pervert
16AnonymousOct 8, 2026 21:45
It refuses anything erotic
I just want it to help organize my adult videos though
17AnonymousOct 8, 2026 21:47
Had it build me video editing software
Made it so I could easily add captions and do all sorts of things
18AnonymousOct 8, 2026 21:47
Two years ago I already had it cleaning the junk out of payment data I'd been fudging my way through in Excel for 20 years
21AnonymousOct 8, 2026 21:49
It can handle pretty much anything you'd do on a computer
23AnonymousOct 8, 2026 21:51
Re: #21
So basically bookkeeping, right?
22AnonymousOct 8, 2026 21:50
Extracting audio from streaming apps
Got it working by combining it with a rooted device
24AnonymousOct 8, 2026 21:51
So all you do with a computer is bookkeeping?
25AnonymousOct 8, 2026 21:51
Would be interesting if a case came out where security camera footage submitted as evidence turned out to be AI-altered, and cameras stopped working as evidence at all
26AnonymousOct 8, 2026 21:52
Does paying really change what you can do that much?
27AnonymousOct 8, 2026 21:53
Re: #26
Honestly I don't really get what the difference is
29AnonymousOct 8, 2026 21:53
With the free version you can only do things that stay entirely online
With the paid version you can have it do local work
30AnonymousOct 8, 2026 21:54
"Semi-automating office work" basically just means bookkeeping, right?
Or rather, the point being made is: aren't you just convincing yourself that's "office work"?
33AnonymousOct 8, 2026 21:58
Honestly, AI makes more sense as a conversation partner
36AnonymousOct 8, 2026 22:00
Re: #33
That's because you don't have to accommodate it (lol)
35AnonymousOct 8, 2026 21:59
Proofreading English emails
Really made me realize how sloppy my English has been all this time
37AnonymousOct 8, 2026 22:02
I have it explain the current state and problems of various countries' economies and use that as material for investment decisions
39AnonymousOct 8, 2026 22:03
Re: #36
No, I meant the replies up above on 5ch —
AI really is better at holding a conversation
40AnonymousOct 8, 2026 22:03
I have it assess my own company's future prospects
41AnonymousOct 8, 2026 22:04
According to Shin Ultraman and Shin Godzilla, isn't the truly important information always kept on paper and never put online?
42AnonymousOct 8, 2026 22:04
Comparing the specs of smartphones and PCs

Lining them up side by side for comparison isn't something you can really do on a PC or phone screen
43AnonymousOct 8, 2026 22:04
Re: #31
You can actually run it right in this thread
I built it six months ago, so I'd need to test whether it still runs in the current environment
Even UPLIFT's login setup changes every few months
But if you give it the right instructions, the AI will dig in and check whether that's changed too
45AnonymousOct 8, 2026 22:05
Re: #43
Try making it reply in the style of Dazai Osamu (famous early-20th-century Japanese novelist)
44AnonymousOct 8, 2026 22:05
I leave all my decisions up to it
It's a load off my mind
46AnonymousOct 8, 2026 22:06
Had it predict lottery numbers a few times — didn't even come close
53AnonymousOct 8, 2026 22:11
17,000 yen each for GPT and Claude Code
34,000 yen total
55AnonymousOct 8, 2026 22:12
Re: #53
So you're spending 400,000 yen a year on this?

Context and Talking Points

Free plans for generative AI tools like ChatGPT mostly run their processing in the cloud, and getting one to handle local file operations or ongoing automation usually requires a paid plan or an API key. The thread’s disagreement over the difference between “semi-automating office work” and “bookkeeping” stems from that blurry boundary — routine tasks like cleaning up payment and deposit data may really be the same work no matter whether you call it “office work” or “bookkeeping.” Examples like proofreading English emails or researching foreign economies for investment decisions are typical cases of people without specialized expertise using AI to support their own decision-making. Meanwhile, the observation that AI’s growing ability to convincingly manipulate video and images could undermine the reliability of “evidence” like security camera footage reads as a case of technological progress rippling into unexpected corners.

※This article is excerpted and summarized from the 5ch (Hello! Project board) thread “Tell Me What You Use AI For.”

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