Trace

Marius Hobbhahn

CEO / Co-Founder, Apollo Research

individual · LinkedIn · Manifund

Total granted
$82,500
Grants
9
Average size
$9,167
Coverage
100%
itemized by recipient
Years active
2025–26

Grants over time

$0$20K$40K$60K$80K20252026
Technical AI safety researchAI safety metaOtherAI governance, policy, and advocacy

Biggest cause areas

Technical AI safety research$27,50033%6
AI safety meta$25,00030%1
Other$20,00024%1
AI governance, policy, and advocacy$10,00012%1

Biggest recipients

Lightcone Infrastructure$25,00030%1
Anthony Duong$20,00024%1
Tarbell Center for AI Journalism$10,00012%1
Inspect Evals$10,00012%1
Jash Vira$6,5008%1
Jord Nguyen$3,0004%1
Sudarsh Kunnavakkam$3,0004%1
Igor Ivanov$3,0004%1

Reviews by Marius Hobbhahn

Lightcone Infrastructure · Manifund · full post · Dec 26, 2025

Lightcone Infrastructure, Dec 2025

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Donating ~half of my remaining regranting funding ($25k). While this is not in the category of things I wanted to fund with the regranting pot (i.e. individuals working on scheming research), I think Lighthaven is worth supporting.

My main evidence is that my MATS scholars really like it and when I've been at Lighthaven for conferences or other meetings I thought it was a great venue.

One caveat is that I think Lighthaven should be funded through institutional donors rather than many small grants due to the obvious overhead considerations and large funding amounts. Though, in the current situation individual donations seem obviously better than nothing.

Inspect Evals · Manifund · full post · Oct 20, 2025

Inspect Evals, Oct 2025

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I think it's great that more people work on Inspect and I've seen a few evals being either competently ported to Inspect or existing evals being significantly improved.

I'm happy to throw in 10k of my regranting money as a sign of my support, but I think the value they provide is clearly big enough that a large funder should support them with hundreds of thousands or millions of dollars in support.

Tarbell Center for AI Journalism · Manifund · full post · Sep 21, 2025

Tarbell Center for AI Journalism, Sep 2025

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I'm recommending a $10k donation as a regrantor.

Multiple journalists in the Tarbell program have previously reached out to me for news articles and, while they are often less experienced, they often ask better questions and write better articles than their senior colleagues.

With better, I specifically don't mean "they represent my opinion", but I mean 1. They have read the paper, and the questions are well-prepared. 2. The resulting texts are typically more accurate and have much fewer factual errors than the texts from my average journalist experience. 3. The questions are often critical and really trying to understand the limitations of the work rather than softball.

In general, all Tarbell journalists I have worked with so far seemed to have high integrity with a strong desire to write an accurate and interesting article for their readership rather than produce an attention-grabbing headline.

Anthony Duong · Manifund · full post · Sep 16, 2025

3 months full-time contributing software to Inspect, Aug 2025

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Anthony has done great work on other OS libraries for AI safety (SAELens, neuronpedia, and SAEDashboard) and I'm excited that he wants to explore building tools for evals.

I've talked to him about his plans and think it's an obviously good funding opportunity.

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3 months full-time contributing software to Inspect, Sep 2025

Adding another 10k after the first month has gone well. Anthony is making fast progress on Inspect. We've discussed plans for longer-term funding, and I'll be bridging the next month until other funding is confirmed.

Jord Nguyen · Manifund · full post · Aug 10, 2025

Benchmarking and comparing different evaluation awareness metrics, Aug 2025

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Offering 3k to get this started. I think the project makes sense, but have no further evidence about the project or authors than listed here.

This donation is not a commitment to follow-up funding, even if reasonable progress is made.

Sudarsh Kunnavakkam · Manifund · full post · Aug 5, 2025

Tooling + Model Orgs for CoT Faithfulness Research, Aug 2025

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I think the topic is important. I have neither done a check on the person running it nor read a more detailed project description than is visible in the grant itself.

If there are interesting results from this funding round, I might be willing to donate a larger follow-up round.

Igor Ivanov · Manifund · full post · Jun 18, 2025

Demonstration of LLMs deceiving and getting out of a sandbox, Jun 2025

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I think realistic demos of autonomous worrying behavior are quite important and there aren't many good examples yet.

I'm not sure whether this particular project will meet my bar for realism, but I think it's worth giving it a try. I have not vetted the project in detail. Impossible tasks as a source of deception have been explored multiple times in the literature. I think the main addition from a project like this would come from making highly realistic agentic scenarios.

Florian Dietz · Manifund · full post · May 11, 2025

Split Personality Training, May 2025

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Funding with $2000 to get the project off the ground.

I have talked to Florian about this project during the last MATS cohort presentation day. I felt like his conceptual considerations were good, and the motivation makes sense.

I have no clear ability in favor or against his ability to execute projects quickly, which is why I'm keeping it at $2k.

I might consider more funding if there are good early results or other strong evidence of progress that I can easily verify. I'd recommend trying to sprint to a 4-6 week MVP and publishing or at least writing up and privately sharing the results.

Grants received 2 · $80,103 · $40,052 average

Date ↓FunderViaAmountCauseSourcePurpose
Jul 2022Long-Term Future FundEA Funds$50,000Career transitionsea_fundsSupport for Marius Hobbhahn for piloting a program that approaches and nudges promising people to get into AI safety faster
Jan 2022Long-Term Future FundEA Funds$30,103Technical AI safety researchea_fundsResearch on AI safety

Grants made

Date ↓RecipientViaAmountCauseSourcePurpose
Jun 18, 2026Tarbell Center for AI JournalismManifund$10,000AdvocacymanifundTarbell Center for AI Journalism
May 13, 2026Jash ViraManifund$6,500FoundationsmanifundAwareness-conditioned emergent misalignment
Dec 26, 2025Lightcone InfrastructureManifund$25,000Epistemic infrastructuremanifundLightcone Infrastructure
Oct 29, 2025Inspect EvalsManifund$10,000EvalsmanifundInspect Evals
Sep 16, 2025Anthony DuongManifund$20,000Othermanifund3 months full-time contributing software to Inspect
Aug 30, 2025Jord NguyenManifund$3,000EvalsmanifundBenchmarking and comparing different evaluation awareness metrics
Aug 5, 2025Sudarsh KunnavakkamManifund$3,000ControlmanifundTooling + Model Orgs for CoT Faithfulness Research
Jun 18, 2025Igor IvanovManifund$3,000ControlmanifundDemonstration of LLMs deceiving and getting out of a sandbox
May 16, 2025Florian DietzManifund$2,000Alignment methodsmanifundSplit Personality Training