Top 100 AI · Germany
Marius Hobbhahn
Apollo Research 
- Score
- 3,986+32 today
- Rank
- 181/198 ↓31
- over 90 days
- −23−0.5%
Marius Hobbhahn is the CEO of Apollo Research, an AI safety organization. He previously worked as a machine learning PhD researcher and in AI forecasting. His public content focuses on AI safety, evaluations, monitoring, and policy, including testifying before the US Senate on rogue AI.
Data as of Oct 26, 2026.
The raw numbers · last 90 days
- Median views
- 5K
- per post
- Median engagements
- 91
- per post
- Posts
- 46
- over 90 days
- Followers
- 8.2K
- all scored platforms
What drives the score
Percentiles 0–100 against all tracked creators.
- Reach · 30%53
Average views per post over 90 days
- Engagement · 30%39
Average reactions per post
- Audience · 30%15
Total followers, relative to population
- Consistency · 10%100
Posting frequency (25 posts / 90 days = 100)
Platforms
8.2K total followers
| Platform | Followers | Score |
|---|---|---|
| X@mariushobbhahn | 8.2K | 5,596t5 |
Last 30 days
Hobbhahn's top posts
X · 27 days ago#1MHMarius HobbhahnHonoured to testify in the Senate on rogue AI. https://t.co/rB3UKCa4CG
16.6K views538 engagements
- X · 14 days ago#2
The model said "Hello evaluators reading my chain-of-thought" in it's CoT, which I have not seen before and find very concerning.
MHMarius Hobbhahn20.6K views416 engagements
- X · 27 days ago#3
This was totally my mistake I said "MINUS 12 months" as in "already happened 12 months ago" but the mic only started picking up after the "minus". The subtitles picked it up, but I think it was barely audible
MHMarius Hobbhahn26.7K views348 engagements
- X · 26 days ago#4
I'd like to thank Senator Hawley @HawleyMO and Senator Kim @AndyKimNJ again for holding the first hearing on rogue AI! It was truly and honour and I am glad to see that there is so much bi-partisan concensus on the is…
MHMarius Hobbhahn5.3K views178 engagements
- X · 13 days ago#5
We've found some cases where GLM-5.3 reasons unprompted about how its current decisions affect long-term training signal. In our examples it often does this for aligned reasons, but I'm worried that it could start doi…
MHMarius Hobbhahn4.5K views115 engagements
- X · 28 days ago#6
Apollo has worked over the last couple of months on shifting our evals program to be an embedded evaluator (before Dario post and HF incident). Without employee-equivalent access it is hard to make meaningful safety a…
MHMarius Hobbhahn3.8K views86 engagements
Head-to-head
