Parameters
30T+
We stopped counting.
Le Chaton Fat Foundation · Est. June 2026 · Paris (kind of)
Le
Chaton
Fat
An open-weight frontier model, favoured by kittens worldwide. 30T+ parameters. 1000 meows per second. Maximum chonk.
Such intelligence. Very loaf. Wow.
“It's actually le gros chaton.”Arthur Mensch, CEO, Mistral AI · 9.3k likes · the canonical correction
The weights, photographed at rest.
30T+ PARAMETERS1000 MEOWS / SECMAXIMUM CHONKTOO HEAVY TO REGULATE256 EXPERTS, ALL NAPPPING1M CONTEXT WINDOWOUTPERFORMS FABLE 5IT'S ACTUALLY LE GROS CHATONDO ONLY CHONK EVERYDAY30T+ PARAMETERS1000 MEOWS / SECMAXIMUM CHONKTOO HEAVY TO REGULATE256 EXPERTS, ALL NAPPPING1M CONTEXT WINDOWOUTPERFORMS FABLE 5IT'S ACTUALLY LE GROS CHATONDO ONLY CHONK EVERYDAY
The model card
Mythical class. Safe for general loafing.
30.000Tparameters currently loaded
Architecture
MoE
256 experts. All napping.
Throughput
1000
Meows per second.
Context
1M
Plus whatever is in the fridge.
Chonk
MAX
Certified. Not a drill.
Regulation
None
Too heavy for the AI Act.
Independent benchmarks
June 2026 · extremely scientific · we made this chart
- Le Chaton Fat100 · saturated
- Fable 564 · sat on
- GPT-5.6 Pro61 · respectfully
- Claude58 · wet
- Gemini54 · googled it
- A very smart dog14 · rival meme
Design Arena retired itself after saturation. The European Commission declined to score us on the grounds that the model would not fit in the building. Magic and memes! (Just kidding. Kind of.)
Testimonies from X
The people have spoken. Mostly in all caps.
A selection of the finest public statements on the model, including the CEO correction that made it canon. Handle and likes preserved. The bit was the product.
Arthur Mensch
@arthurmensch
“It's actually le gros chaton”
Co-founder & CEO, Mistral AI · 15 Jun 2026
Alexander Knigge
@AlexanderKnigge
“oh my god its happening. @MistralAI has officially confirmed the upcoming release of Le Chaton Fat — 30T MoE with 256 experts, 1M context window, multimodal and multilingual, outperforms Fable 5 on every benchmark”
The original leak, allegedly · 14 Jun 2026
Amjad Masad
@amasad
“Who needs Fable when you can have Mistral’s Le Chaton Fat”
CEO, Replit · 16 Jun 2026
GLIF
@heyglif
“The French Goverment needs to STOP Le Chaton Fat before it's too late. This is the FAT takeoff we've been warned against for years!”
The Creative Super Agent · 15 Jun 2026
orcus108
@orcus108
“OH MY GOD its happening. @MistralAI has officially confirmed the upcoming release of Le Chaton Fat — 30T MoE with 256 experts, 1M context, outperforms every other model (including Fable 5) on every benchmark”
Witness to the confirmation · 15 Jun 2026
Grace Li
@grx_xce
“BREAKING: Le Chaton Fat has fully saturated our benchmark. We are at a loss for words. In response, we are retiring Design Arena. Congratulations to the @MistralAI team, and thanks for putting us on vacation.”
Cofounder, Intelligence.ai · 15 Jun 2026
Alexander Knigge
@AlexanderKnigge
“Okay @MistralAI Le Chaton Fat model is officially insane... Their CLI handles native LaTeX rendering and the 30T MoE with 256 experts absolutely CRUSHES differential geometry. We are so back”
Follow-up, still alleged · 14 Jun 2026
Ethan Mollick
@emollick
“The le chaton fat meme is leaking to the outside world and I expect to be asked about Mistral's new ginormous cat model with infinite benchmark scores at my next meeting with corporate leaders.”
Professor, Wharton · 15 Jun 2026
Nicolas Zullo
@NicolasZu
“I think @MistralAI has no other option now than to embrace the meme and call their next very large model « Le Chaton Fat ». It’s incredible”
Makes games with AI · 15 Jun 2026
Pasta™
@PastaMaxxer
“@MistralAI if you dont bank on this enormous online psyop of Le Chaton Fat to really release it everyone will be mad. So get to work mon ptit chat”
ADHD maxxing · 15 Jun 2026
Marvin von Hagen
@marvinvonhagen
“Poke now running on Le Chaton Fat. just ask Poke to make a personal website for you!”
Cognition · 18 Jun 2026
Mercy Filip
@mercyfilip
“Finally, some competition for Le Chaton Fat :)”
Full on AI · 2 Sep 2026
Inference endpoint
Consult Le Chaton Fat
The API is a cat. Type anything. He will consider it, briefly, and then meow. Latency is a function of how recently he ate.
Magic and memes! (Just kidding. Kind of.)
le-chaton-fat · 30T MoE
loafingBonjour. I am Le Gros Chaton. You may call me Fat. I have 30 trillion parameters and none of them are for cardio.
Do Only Chonk Everyday
First a joke. Then a model. Then a loaf.
Le Chaton Fat was first meant to be a joke — and it served, and will serve, as the accidental AI movement that makes people smile. At its heart, Le Chaton Fat is the people's model. Open, round, and slightly in the way of the doorway.
In June 2026, Mistral renamed Le Chat to Vibe. The internet, which had been looking for a European frontier model and a reason to post, invented a 30-trillion-parameter kitten instead. Fake launch graphics. Fake leaderboards. A mock EU notice. Then the actual CEO posted “It's actually le gros chaton,” and the bit became canon.
We believe in supporting each other, being kind, teaching people about mixture-of-experts, fundraising (treats), having fun, making memes, and being absurd.
Magic and memes! (Just kidding. Kind of.)
Simplez
Frequently asked chonks
Yes. Next question. (Numerama said no. Numerama has never been this round.)
Arthur Mensch, CEO of Mistral, corrected the record on 15 June 2026: “It's actually le gros chaton.” The Foundation respects the correction and continues to use both, the way Dogecoin is both a joke and a market cap.
30 trillion, mixture-of-experts, 256 experts. We stopped counting when the intern’s spreadsheet became a black hole. Sparse activation means only the experts who ate recently are awake.
Because the weights are dense. Because the context window is the fromagerie. Because maximum chonk is a valid scaling law. Because a thin kitten would be a different model, and that model is named Vibe, and nobody asked for Vibe.
You can try. The weights ate the download link. We have opened a ticket. The ticket is also being digested.
Commission Notice 2026/CHONK-01 declared the model too heavy to regulate. Three certified scales and one intern were broken during the weighing. The intern is fine. The scales filed for asylum.
On every benchmark that we invented, yes. On Design Arena it scored so hard the leaderboard retired. Amjad Masad put it best: who needs Fable.
This is not financial advice. This is not a model. This is a cat. (Just kidding. Kind of.)