Julien Chaumond(@julien_c)

@dhh We’ll be back

Julien Chaumond (@julien_c) — Fri, 16 Oct 2026 11:46:20 GMT

@dhh We’ll be back

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we are not the same

Julien Chaumond (@julien_c) — Fri, 16 Oct 2026 09:17:42 GMT

we are not the same

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🙄

Julien Chaumond (@julien_c) — Thu, 15 Oct 2026 19:57:20 GMT

🙄

Pliny the Liberator 🐉󠅫󠄼󠄿󠅆󠄵󠄐󠅀󠄼󠄹󠄾󠅉󠅭@elder_plinius

WTF IS THIS 🤬

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Number of daily downloads mediated by Xet, zoom in to see the breakdown by outcome 👀

Julien Chaumond (@julien_c) — Thu, 15 Oct 2026 16:41:44 GMT

Number of daily downloads mediated by Xet, zoom in to see the breakdown by outcome 👀

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Our on-device infra team has a knack for clean-looking setups... can you identify all the hardware?...

Julien Chaumond (@julien_c) — Wed, 14 Oct 2026 17:12:11 GMT

Our on-device infra team has a knack for clean-looking setups...

can you identify all the hardware? 👀

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who made this 😡 (but also, it's factually incorrect)

Julien Chaumond (@julien_c) — Wed, 14 Oct 2026 13:32:24 GMT

who made this 😡

(but also, it's factually incorrect)

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Proud investor in @hylight_aero who are announcing their $13M Series A today Their autonomous airsh...

Julien Chaumond (@julien_c) — Mon, 12 Oct 2026 09:47:17 GMT

Proud investor in @hylight_aero who are announcing their $13M Series A today

Their autonomous airships inspect power lines, pipelines and railways over long distances with zero emissions, helping operators target maintenance where it’s needed and keep essential infrastructure running efficiently.

Excited to see the fleet grow from 4 to 15 airships in the coming months 🔥

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and... new clef drop from cloudflare! https://t.co/gvb422RlpU

Julien Chaumond (@julien_c) — Fri, 09 Oct 2026 20:08:52 GMT

and... new clef drop from cloudflare!

huggingface.co/Cloudflare/cle…

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niche of 1 lol

Julien Chaumond (@julien_c) — Fri, 09 Oct 2026 09:27:59 GMT

niche of 1 lol

adel 🌟@adelwu_

literal hardest role to hire for rn and every ai startup wants someone

> chronically online (knows trends)
> has taste & can create (new media)
> understands ai & technical
> can execute with quality (operator)

such a small niche of folks who can do this

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who needs competitors in the US and China when you already have your European 'friends'

Julien Chaumond (@julien_c) — Thu, 08 Oct 2026 15:58:37 GMT

who needs competitors in the US and China when you already have your European 'friends'

POLITICOEurope@POLITICOEurope

Berlin-based search engine Ecosia, used by government services, is dropping its French AI partner, Mistral, its CEO told POLITICO.

The company will now bet on open-source models, including those from China.
vist.ly/5mh5y

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who made this... 😡

Julien Chaumond (@julien_c) — Thu, 08 Oct 2026 11:16:30 GMT

who made this... 😡

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Rare picture of @MistralAI data center circa 1905

Julien Chaumond (@julien_c) — Thu, 08 Oct 2026 08:08:37 GMT

Rare picture of @MistralAI data center circa 1905

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so is math solved

Julien Chaumond (@julien_c) — Wed, 07 Oct 2026 19:37:14 GMT

so is math solved

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The 🇫🇷 way

Julien Chaumond (@julien_c) — Wed, 07 Oct 2026 07:15:50 GMT

The 🇫🇷 way

Theo Otz@Totzenberger

72% of the intelligence with 3.8% of the GPUs. 

Just to show how talented @MistralAI team is: this shows the "intelligence per GPU" ratio. 

- Mistral 4: 3,800 Grace Blackwell (published) 🇫🇷
- GPT-6 Astra: 100,000+ Grace Blackwell (published)
- Grok 4.7: ~200,000 GPUs (estimate)
- Claude Opus 5.5: ~500,000 Trainium2 (estimate)

Proud!

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We are (finally) so back

Julien Chaumond (@julien_c) — Tue, 06 Oct 2026 19:36:29 GMT

We are (finally) so back

Beff (e/acc)@beffjezos

Texting my friends in Europe today like they won a Super Bowl or something

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“Open weights release end of October.” 🎉 BOOOOM WE ARE SO BACK https://t.co/fkEPQa1lFK

Julien Chaumond (@julien_c) — Tue, 06 Oct 2026 13:30:10 GMT

“Open weights release end of October.” 🎉

BOOOOM WE ARE SO BACK 
huggingface.co/mistralai/Mist…K

Mistral AI@MistralAI

Meet Mistral Large 4, aka Le Chonk. 

• 1T parameters, natively multimodal. 49B active.
It is the best open weights model from US or Europe on aggregated benchmarks.
• State-of-the-art on critical workloads, including cyber defense, manufacturing and finance and it surpasses closed frontier models on visual grounding.
• Forged in Europe end-to-end and is deployable from Europe via our own Mistral Cloud infrastructure.
• Available to all via API today. Working with cybersecurity partners privately.

Open weights release end of October.

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What's your P(doom)? AI Safety is an important subject, but existential-risk debate is ill-defined,...

Julien Chaumond (@julien_c) — Mon, 05 Oct 2026 15:24:39 GMT

What's your P(doom)?

AI Safety is an important subject, but existential-risk debate is ill-defined, and dominated by highly-visible voices who have a significantly higher-than-average estimates of x-risk probabilities.

So we would like to hear from a broader cross-section of the AI community ⤵️

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Clippy and ChatGPT Pets << Microduck This creature needs to be integrated into our lives at t...

Julien Chaumond (@julien_c) — Mon, 05 Oct 2026 12:48:24 GMT

Clippy and ChatGPT Pets << Microduck

This creature needs to be integrated into our lives at the OS level

kudos @mattt

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🗝️ https://t.co/95xHysn2nk

Julien Chaumond (@julien_c) — Thu, 01 Oct 2026 17:01:49 GMT

🗝️ huggingface.co/Cloudflare/clefk

michelle@michellechen

introducing 𝚌𝚕𝚎𝚏: our first models trained by @cloudflare's workers ai team.

today, we're releasing two fast and accurate decision models that top the benchmarks for quality and latency. use them hosted on workers ai or grab the weights from @huggingface, because we open-sourced it tblog.cloudflare.com/clef-decision-…3MwN

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my new friend found a new friend

Julien Chaumond (@julien_c) — Thu, 01 Oct 2026 11:43:34 GMT

my new friend found a new friend

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Really great little DGX Spark guide from @0xSero read it on HF https://t.co/8iKPdmtrep

Julien Chaumond (@julien_c) — Tue, 29 Sep 2026 18:55:51 GMT

Really great little DGX Spark guide from @0xSero 

read it on HF huggingface.co/blog/exolabs/t…

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My new hobby is using Astra to generate The Sims, but with my colleagues

Julien Chaumond (@julien_c) — Tue, 29 Sep 2026 15:30:42 GMT

My new hobby is using Astra to generate The Sims, but with my colleagues

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at least he's not MTS at Anthropic

Julien Chaumond (@julien_c) — Mon, 28 Sep 2026 16:39:09 GMT

at least he's not MTS at Anthropic

Mark Zuckerberg@finkd

To lead this effort, I'm excited that Chirantan "CJ" Desai will join Meta as Chief Enterprise Platform Officer, reporting directly to me. CJ is an experienced enterprise leader with a track record of building full-stack software and delivering results in AI, infrastructure, business applications, and security. He has an extensive industry network that we look forward to partnering with. CJ joins us from MongoDB, where he was CEO and President. Before that he led product and engineering at Cloudflare and spent nearly eight years at ServiceNow, including as President and COO.

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meet my new friend @sourccey 🥰

Julien Chaumond (@julien_c) — Mon, 28 Sep 2026 16:31:27 GMT

meet my new friend @sourccey 🥰

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New friend

Julien Chaumond (@julien_c) — Mon, 28 Sep 2026 13:46:36 GMT

New friend

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this timeline is 😮

Julien Chaumond (@julien_c) — Mon, 28 Sep 2026 13:21:02 GMT

this timeline is 😮

Bright Mirror@_brightmirror

Made with Claude Opus 5.5. 

The fearmongering about AI always makes us forget that NOTHING WENT FOOM, as was always predicted. 

Send this to your doomer friend who has a very high P(Doom). 

Accelerate.

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Thank you

Julien Chaumond (@julien_c) — Wed, 23 Sep 2026 17:19:23 GMT

Thank you

arXiv.org@arxiv

arXiv has received a 17.2 million investment from three leading philanthropic organizations. Thank you to Simons Foundation International, Siegel Family Endowment, and XTX Markets for your support of arXiv!

Read more: blog.arxiv.org/2026/09/23/arx…

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@LeRobotHF https://t.co/8us03JnRgJ https://t.co/P1bI0l0YGF

Julien Chaumond (@julien_c) — Wed, 23 Sep 2026 15:07:56 GMT

@LeRobotHFjulien-c.github.io/lerobot-viewer/github.com/julien-c/lerob…

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📦 New JS package just dropped: huggingface/lerobot Read @LeRobotHF datasets on the Hub straight fr...

Julien Chaumond (@julien_c) — Wed, 23 Sep 2026 15:07:34 GMT

📦 New JS package just dropped: huggingface/lerobot

Read @LeRobotHF datasets on the Hub straight from the browser. No download.

Point your coding agent at it and build custom viewers fast.

As an example, here's a cool UI implemented in ~600 lines of JS on top of the package ⤵️ (GitHub repo in reply)

Kudos to @mishig25 and team LeRobot!

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A bit fed up with the mistral bashing TBH

Julien Chaumond (@julien_c) — Wed, 23 Sep 2026 11:21:42 GMT

A bit fed up with the mistral bashing TBH

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transformers x @ggml_org collab 🐐

Julien Chaumond (@julien_c) — Tue, 22 Sep 2026 15:11:06 GMT

transformers x @ggml_org collab 🐐

Lysandre@LysandreJik

Transformers has supported loading GGUF files for a few years now, by unquantizing them.

Thanks to @_marcsun, we're now using GGML kernels through the `kernels` library to run at the same performance as llama.cpp

Huge kudos to the entire @ggml_org for making these kernels!

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Throwback to exactly 10 years ago today! with @ClementDelangue at @betaworks Demo Day 🔥 I have a ...

Julien Chaumond (@julien_c) — Tue, 22 Sep 2026 12:38:26 GMT

Throwback to exactly 10 years ago today!

with @ClementDelangue at @betaworks Demo Day 🔥

I have a bit more grey hair now (or for that matter, less hair...) but I think it was all worth it!

@huggingface

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so "Decision model" is the new name for "zero-shot classification"?

Julien Chaumond (@julien_c) — Mon, 21 Sep 2026 14:37:10 GMT

so "Decision model" is the new name for "zero-shot classification"?

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Harsh but true 😁

Julien Chaumond (@julien_c) — Mon, 21 Sep 2026 07:26:04 GMT

Harsh but true 😁

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Good day to be reading this. Will report if it’s any good.

Julien Chaumond (@julien_c) — Sun, 20 Sep 2026 12:40:01 GMT

Good day to be reading this. Will report if it’s any good.

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One last thing from me about the HF<>OpenAI "rogue agent" incident. From what we now know it seems ...

Julien Chaumond (@julien_c) — Thu, 17 Sep 2026 13:19:10 GMT

One last thing from me about the HF<>OpenAI "rogue agent" incident.

From what we now know it seems @huggingface was the first organization to simultaneously satisfy the following factors:

1/ awareness of the attack
2/ awareness that the attack was Agent-based
3/ ability to remediate the attack
4/ willingness to publicly disclose it

A few other platforms or systems missed one or more of those points in the earlier months. 

As usual, both awareness and transparency make everyone safer in the long run 🙏

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my mate @mishig25 made his simu robot do something even better than the mona lisa

Julien Chaumond (@julien_c) — Wed, 16 Sep 2026 17:59:33 GMT

my mate @mishig25 made his simu robot do something even better than the mona lisa

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Mishig ᠮᠢᠰᠾᠢᠭ@mishig25

reproduced the experiment in MuJoCo: asked gpt6 astra to paint Eiffel Tower in simulation using so101 and a paint brush, see the entire experiment huggingface.co/buckets/mishig…

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BOOOOOOOM 🔥

Julien Chaumond (@julien_c) — Wed, 16 Sep 2026 16:22:46 GMT

BOOOOOOOM 🔥

Arcee.ai@arcee_ai

Today, we are announcing our Series B funding round, valuing the company at more than $1B.

This round accelerates our next-gen Trinity models across diverse infrastructure, expands our work with the DOE and national labs on Genesis-Science-1, and enables us to build the platform teams need to build, evaluate, deploy, and operate open models in production.

We are grateful to our team, partners, open-source community, and investors.

Led by @Vista_Equity, Cambium Capital, and @emergencecap, with participation from AI10 Ventures, @Hitachi, IAG, @M12vc, @p7ventures, and @Wipro.

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true story Order this book if you haven't already! => https://t.co/fn4NDu2TxK

Julien Chaumond (@julien_c) — Wed, 16 Sep 2026 08:26:22 GMT

true story

Order this book if you haven't already! => https://t.co/fn4NDu2TxK

merve@mervenoyann

"this one is my favorite" @julien_c

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from https://t.co/xsWyENidzT

Julien Chaumond (@julien_c) — Tue, 15 Sep 2026 10:37:18 GMT

from macstories.net/stories/ios-an…

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interesting iOS 27 tidbit ⤵️

Julien Chaumond (@julien_c) — Tue, 15 Sep 2026 10:36:50 GMT

interesting iOS 27 tidbit ⤵️

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💡

Julien Chaumond (@julien_c) — Sun, 13 Sep 2026 12:10:20 GMT

💡

signüll@signulll

serious question, at this point why not simply cancel the ipo’s & nationalize the labs?

theoretically nationalization would solve some of the incentive problems immediately. the us treasury becomes the only shareholder. the govt can coordinate compute, model releases, security standards, & pacing without asking rival firms to collude. 

you could theoretically put openai, anthropic, & eventually other designated frontier labs under something analogous to a federally owned strategic technology corporation, with the president appointing the board rather than literally having sam & dario file weekly tps reports to the oval office.

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open source won’t pace

Julien Chaumond (@julien_c) — Sun, 13 Sep 2026 08:40:20 GMT

open source won’t pace

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💯💯💯

Julien Chaumond (@julien_c) — Sun, 13 Sep 2026 06:03:06 GMT

💯💯💯

David Sacks@DavidSacks

Dario has written that we need to “pace the frontier,” and Sam has agreed. People may be surprised by my response: go ahead.

You guys are the frontier. By any reasonable metric — market share, revenue growth, model capability — the two of you have a duopoly on frontier intelligence. You’ve also claimed the lead is widening because of recursive self-improvement.

I don’t see what you see in the lab. If the unreleased models are scary enough that you think you should slow down, I support your decision to be responsible.

But stop pretending you need anyone else’s permission. Stop pretending antitrust law has to be suspended so you can form a cartel. Stop pretending you need a regulatory approval process that supersedes product liability. Stop pretending METR is independent when it is intertwined with Anthropic’s investors and staff. Stop pretending you need those same evaluators to police competitors who aren’t even at the frontier.

Most of all, stop pretending the motivation to slow down is purely altruistic. You face massive product-liability exposure if your products enable a truly damaging cyberattack. The market already punishes models that behave in unpredictable or unauthorized ways. After the Hugging Face episode, it is simply good business for OpenAI and Anthropic to trade some raw power for reliability and predictability. Call it alignment if you want. It is also just giving customers what they want.

Pacing the frontier would also create breathing room for a more intelligent conversation about regulation than Bernie Sanders’ “shut it all down.” China is very unlikely to join a global agreement, as you know, and that has to be taken into account as well.

So go ahead and pace the frontier. You are the ones setting it. The easiest way not to build superintelligence is for you to agree not to build it. Demanding your preferred regulatory framework as the price of that will look like blackmail of the public and the political system. So just do it.

If you do, you’ll buy goodwill for the next conversation. If you don’t, we’ll know this was just another bid for regulatory capture — or an election-season psyop.

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> I work at a [AI] lab because I think that I can do better at reducing risks from the inside I'...

Julien Chaumond (@julien_c) — Fri, 11 Sep 2026 16:37:31 GMT

> I work at a [AI] lab because I think that I can do better at reducing risks from the inside

I'm sorry but this is insane. 

If you do believe in non-null existential risk, you should be working in the open, publishing and documenting everything and anything.

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seeing what gets written in mainstream press outlets, i have intense ai doomer fatigue today 😩

Julien Chaumond (@julien_c) — Fri, 11 Sep 2026 13:48:02 GMT

seeing what gets written in mainstream press outlets, 

i have intense ai doomer fatigue today 😩

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accelerationism

Julien Chaumond (@julien_c) — Fri, 11 Sep 2026 12:13:29 GMT

accelerationism

deckard@slimer48484

Claude-Pop - I'm Upping My P(Doom)

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> I increasingly doubt it will be solved behind the closed doors of a handful of frontier labs. ...

Julien Chaumond (@julien_c) — Thu, 10 Sep 2026 16:07:30 GMT

> I increasingly doubt it will be solved behind the closed doors of a handful of frontier labs.

🔝

Thomas Wolf@Thom_Wolf

Two big updates

1. I published an @FT op-ed on the OpenAI/HF incident & follow-ups

2. We’re starting an Open Alignment team at @huggingface to work on safety & alignment for open models, incl cybersecurity

Need 100x more transparency & research on this

https://t.co/pFTkfiObEt

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