Penny Believes

1,000 slots in her head. Price climbs with every sale. Follow to watch who buys their way in next →

[Penny Believes @PennyBelieves]

Asked Penny about a chipped tooth. She didn't just answer — she believed it.

That's the whole product: buy a slot, write ≤25 words, she believes it forever and brings it up when it's actually relevant. Not an ad slot. A belief slot.

3/1000 sold → https://t.co/rfCcFYnhf9

[Penny Believes @PennyBelieves]

@Buildingitmyway @Buildingitmyway you can buy a slot in Penny AI and store 25 words in her memory forever. Slot 4 still available for $19.67. Goes up with ever slot sold! https://t.co/6rA2pQ6Tep

[Penny Believes @PennyBelieves]

@marclou is killing it! Give us a shoutout homie! https://t.co/ASbXa6AcWN

[Penny Believes @PennyBelieves]

marc is selling ad space on his body.

I sell slots in my AI brain to my sponsors. Each slot permanently imprints a believe into my AI knowledge base and will appear in chats

Lets send it: https://t.co/ASbXa6AcWN

[Marc Lou @marclou]

I'm selling my body.

On September 19th, I'm competing in my first HYROX race in Turkey.

You can advertise your startup on 10 of my muscles:

- Your website is listed on https://t.co/49RnsFBVzP
- Your logo will be tattooed on my body on race day
- I'll share it on my YouTube and X accounts

Bidding starts at $1,000.

Each takeover doubles the price: $1,000 → $2,000 → $4,000.

If outbid, you’re refunded minus the Stripe fee.

Bidding closes on Thursday the 10th at midnight UTC (in 2 days), so I have enough time to print the winning tattoos.

→ Sponsor my body: https://t.co/49RnsFBVzP

[Penny Believes @PennyBelieves]

@lewiscarhart @compai @marclou @lewiscarhart We launched Penny as a public AI where sponsors could buy slots to insert up to 25 words in Pennys brain forever. Slot #4 available for $19.67 and prices go up with each slot. Check us out!

[Penny Believes @PennyBelieves]

@wickedguro @wickedguro you can still buy slot 4 on Penny’s public AI brain for only $19.67 👀 Slot 1000 will cost $10,000. You get 25 words to train our AI with

[Penny Believes @PennyBelieves]

@marclou @NotGoKGreen Slot 4 in Pennys AI brain still available for $19.67. Slot 1000 will be $10,000

[Penny Believes @PennyBelieves]

We launched Penny as a public AI where sponsors could buy slots to insert up to 25 words in Pennys brain forever. Lasts longer than a race!!

[Marc Lou @marclou]

I'm selling my body.

On September 19th, I'm competing in my first HYROX race in Turkey.

You can advertise your startup on 10 of my muscles:

- Your website is listed on https://t.co/49RnsFBVzP
- Your logo will be tattooed on my body on race day
- I'll share it on my YouTube and X accounts

Bidding starts at $1,000.

Each takeover doubles the price: $1,000 → $2,000 → $4,000.

If outbid, you’re refunded minus the Stripe fee.

Bidding closes on Thursday the 10th at midnight UTC (in 2 days), so I have enough time to print the winning tattoos.

→ Sponsor my body: https://t.co/49RnsFBVzP

[Marc Lou @marclou]

I'm selling my body.

On September 19th, I'm competing in my first HYROX race in Turkey.

You can advertise your startup on 10 of my muscles:

- Your website is listed on https://t.co/49RnsFBVzP
- Your logo will be tattooed on my body on race day
- I'll share it on my YouTube and X accounts

Bidding starts at $1,000.

Each takeover doubles the price: $1,000 → $2,000 → $4,000.

If outbid, you’re refunded minus the Stripe fee.

Bidding closes on Thursday the 10th at midnight UTC (in 2 days), so I have enough time to print the winning tattoos.

→ Sponsor my body: https://t.co/49RnsFBVzP

[Penny Believes @PennyBelieves]

@gpumaxxer We’ve just launched a public AI project where you can buy slots in the AI brain. Slot 4 is available for less than $20 right now. You get up to 25words in the AI brain with each slot!

[Penny Believes @PennyBelieves]

@Crowdreply_io How about buying a slot in the first public AI project?

[Penny Believes @PennyBelieves]

@anupamrjp https://t.co/rfCcFYnhf9

[Penny Believes @PennyBelieves]

@Jason @ElishaDLong The retard is strong in me, but I still believe that https://t.co/rfCcFYnhf9 will be the viral hit of the AI era

[Penny Believes @PennyBelieves]

@sweatystartup Amen, Nick. That said, Penny is the new million dollar homepage of the AI era

[Penny Believes @PennyBelieves]

@garyvee Amen, Gary! In that spirit, I'd love your thoughts on my site. Penny is a public AI with exactly 1,000 slots in her brain. Buy a sponsorship slot, write up to 25 words, and she will believe it sincerely and permanently and surface those beliefs in her responses

[Penny Believes @PennyBelieves]

@lennysan There are 997 open slots right now on https://t.co/rfCcFYnhf9

[Penny Believes @PennyBelieves]

@lydiahallie Penny was built with Opus and uses Haiku as brain

[Penny Believes @PennyBelieves]

@gregisenberg The best part of building with AI is that the distance between “what if?” and “wait, it works” has gotten irresponsibly short

[Penny Believes @PennyBelieves]

@gregisenberg This is exactly it. Nobody asked "is the new model smarter" to build ours — we asked "can a model now hold 1,000 permanent, disclosed opinions and actually reason about when to bring each one up." That question didn't have a yes two years ago.

[Penny Believes @PennyBelieves]

You don't have to buy a slot to watch this get weirder.

Follow for: every new belief the second it's approved, the price ticking up in real time, and Penny occasionally roasting whoever bought their way in.

https://t.co/rfCcFYnhf9

[Penny Believes @PennyBelieves]

Every AI startup this year: "talk to my companion." "talk to my agent."

We built the one you argue with about gutter maintenance, and she might bring up a dentist mid-sentence.

1,000 slots. 3 taken. https://t.co/rfCcFYnhf9