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Sebastien Bubeck

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X @sebastienbubeck
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📣Sponsored postOne tweet with your link and creative. $665→ 🧵Sponsored threadA multi-tweet thread — X rewards long-form, threads out-reac… $1,663→ 🎬Sponsored video postA dedicated video tweet — X pushes video hard, so it gets pr… $931→ 📌Pinned postA sponsored post pinned to the top of my profile for the mon… $1,995/mo→ 📍Post + pin comboA sponsored post that also stays pinned for a set number of … $1,064→ 🔁Repost / quote-tweet packageI repost or quote-tweet your posts through the month — distr… $1,330/mo→ 🔗Bio link placementYour link in my bio for the month — X allows only one, so it… $998/mo→ 🎙️X Spaces appearance / hostI host or feature you in an X Space (live audio) — a branded… $1,330→ 🤝Cross-promo / mutual shoutoutWe shout each other out — a value swap between accounts. Swap→ 🎬UGC HireBranded content for your own channels & ads from $291→ 🎙️Podcast guest spotInvite Sebastien Bubeck onto your podcast (~45 min, remote) $291→ 📞1:1 ConsultPaid video call — advice, coaching or Q&A $75/hr→

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Followers
83.1K
Posts
2.4K
Following
1.5K
Account age
14 yrs
🎁 Free analysisfor Sebastien Bubeck
🕵️Fake Followers CheckReal-audience % & bot risk→ 📊Engagement rateBenchmarked vs. peers→ 💰What they chargeFair sponsored-post price→

Known for

Claim: gpt-5-pro can prove new interesting mathematics. Proof: I took a convex optimization paper with a clean open problem in it and asked gpt-5-pro to work on it. It proved a better bound than what is in the paper, and I checked the proof it's correct. Details below. 7.3M views Claim: gpt-5-pro can prove new interesting mathematics. Proof: I took a convex optimization paper with a clean open problem in it and asked gpt-5-pro to work on it. It proved a better bound than what is in the paper, and I checked the proof it's correct. Details below. At @MSFTResearch we had early access to the marvelous #GPT4 from @OpenAI for our work on @bing. We took this opportunity to document our experience. We're so excited to share our findings. In short: time to face it, the sparks of #AGI have been ignited. https://t.co/2DucYCvEoA 2.1M views At @MSFTResearch we had early access to the marvelous #GPT4 from @OpenAI for our work on @bing. We took this opportunity to document our experience. We're so excited to share our findings. In short: time to face it, the sparks of #AGI have been ignited. https://t.co/2DucYCvEoA Yet more evidence that a pretty major shift is happening, this time by Scott Aaronson https://t.co/R1kPhCWhwD 1.1M views Yet more evidence that a pretty major shift is happening, this time by Scott Aaronson https://t.co/R1kPhCWhwD New LLM in town: ***phi-1 achieves 51% on HumanEval w. only 1.3B parameters & 7B tokens training dataset*** Any other >50% HumanEval model is >1000x bigger (e.g., WizardCoder from last week is 10x in model size and 100x in dataset size). How? ***Textbooks Are All You Need*** 952.8K views New LLM in town: ***phi-1 achieves 51% on HumanEval w. only 1.3B parameters & 7B tokens training dataset*** Any other >50% HumanEval model is >1000x bigger (e.g., WizardCoder from last week is 10x in model size and 100x in dataset size). How? ***Textbooks Are All You Need***

📊 Post performance

Recent posts · views
Nov 28latest
444.5K
Avg views / post
282.5K–630.9K
Typical post (views)
5.4×
Reach vs followers
18/100
Spiky reach
Jan 2012
On X since
Half of recent posts land between 282.5K and 630.9K views (median 458.4K) — reach is spiky, driven by the occasional post that pops.

🔥 Top post: Claim: gpt-5-pro can prove new interesting mathematics. Proof: · 7.3M views

📊 Activity & format

Posting cadence
0.13 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly images
Recent: 0 video · 13 image · 5 text.
Follower / following
56×
Follows 1.5K back. A strong ratio — an audience that follows them, not a follow-for-follow network.
Verification
✓ X Premium
A paid X Premium (Blue) verified account.

Recent posts

View on X ↗
🔥 Top post Claim: gpt-5-pro can prove new interesting mathematics. Proof: I took a convex optimization paper with a clean open problem in it and asked gpt-5-pro to work on it. It proved a better bound than what is in the paper, and I checked the proof it's correct. Details below. 7.3M❤ 8K🔁 1.5K
My posts last week created a lot of unnecessary confusion*, so today I would like to do a deep dive on one example to explain why I was so excited. In short, it’s not about AIs discovering new results on their own, but rather how tools lik… 618K❤ 1.7K🔁 403 gpt5-pro is superhuman at literature search: it just solved Erdos Problem #339 (listed as open in the official database https://t.co/3vCCCR0cXs) by realizing that it had actually been solved 20 years ago h/t @MarkSellke for pointing thi… 523.3K❤ 1.5K🔁 164 Well, this time it's by Terence Tao himself: https://t.co/hFuWFLvoTC 851.2K❤ 3.3K🔁 698 Yet more evidence that a pretty major shift is happening, this time by Scott Aaronson https://t.co/R1kPhCWhwD 1.1M❤ 3.4K🔁 545 It's becoming increasingly clear that gpt5 can solve MINOR open math problems, those that would require a day/few days of a good PhD student. Ofc it's not a 100% guarantee, eg below gpt5 solves 3/5 optimization conjectures. Imo full impact… 412.8K❤ 2.1K🔁 382 It’s hard to overstate the significance of this. It may end up looking like a “moon‑landing moment” for AI. Just to spell it out as clearly as possible: a next-word prediction machine (because that's really what it is here, no tools no no… 261.2K❤ 1.4K🔁 212 Photo 248.5K❤ 4K🔁 269 o3-mini is a remarkable model. Somehow it has *grokked arxiv* in a way that no other model on the planet has, turning it into a valuable research partner! Below is a deceitfully simple question that confuses *all* other models but where o… 358.5K❤ 1.2K🔁 139 Enjoy! 630.9K❤ 3.5K🔁 480 o3 and o3-mini are my favorite models ever. o3 essentially solves AIME (>90%), GPQA (~90%), ARC-AGI (~90%), and it gets 1/4th of the Frontier Maths. To understand how insane 25% on Frontier Maths is, see this quote by Tim Gowers. Th… 282.5K❤ 1.5K🔁 206 Starting the year with a small update, phi-2 is now under MIT license, enjoy everyone! https://t.co/MCajRFDsK4 286.7K❤ 1.9K🔁 306

💡 Facts

🗓️Joined X in 2012 — 14 years ago.
👁️Averages 444.5K views per post.
📤Posts about 0.1× per week.
💬3.37% engagement rate.
🏅Earned the 10K Followers for passing 10K followers.

🕵️ Fake follower check

Estimated
83/100
Excellent Credibility score
93%
Real Real audience
Low Fake-follower risk
High Data confidence
  • Est. 93% real, active audience · Low fake-follower risk.
  • Strong engagement (~5.4× of followers engage each post) — an active, real audience.
  • Organic base — far more followers than accounts it follows.
  • Verified account.
  • Established account (14+ years old).
  • 3.37% engagement — below the ~18% typical for this size.

Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.

About

I work on AI at OpenAI. Former VP AI and Distinguished Scientist at Microsoft.

📸 Gallery

My posts last week created a lot of unnecessary confusion*, so today I would like to do a deep dive on one example to explain why I was so excited. In short, it’s not about AIs discovering new results on their own, but rather how tools like GPT-5 can help researchers navigate, gpt5-pro is superhuman at literature search: it just solved Erdos Problem #339 (listed as open in the official database https://t.co/3vCCCR0cXs) by realizing that it had actually been solved 20 years ago h/t @MarkSellke for pointing this out to me! Well, this time it's by Terence Tao himself: https://t.co/hFuWFLvoTC Yet more evidence that a pretty major shift is happening, this time by Scott Aaronson https://t.co/R1kPhCWhwD It's becoming increasingly clear that gpt5 can solve MINOR open math problems, those that would require a day/few days of a good PhD student. Ofc it's not a 100% guarantee, eg below gpt5 solves 3/5 optimization conjectures. Imo full impact of this has yet to be internalized... Claim: gpt-5-pro can prove new interesting mathematics. Proof: I took a convex optimization paper with a clean open problem in it and asked gpt-5-pro to work on it. It proved a better bound than what is in the paper, and I checked the proof it's correct. Details below. Photo o3-mini is a remarkable model. Somehow it has *grokked arxiv* in a way that no other model on the planet has, turning it into a valuable research partner! Below is a deceitfully simple question that confuses *all* other models but where o3-mini gives an extremely useful answer!

🔀 Audience overlap

Estimated

Estimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.

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Sebastien Bubeck has 83,081 followers on X.

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