zef

Karma: 237

Founder, agent infrastructure and interfaces at Fulcrum Research, https://fulcrum.inc

Past: MIT, MAIA, theory of deep learning research

More info: https://uzpg.me

Fable is SOTA at CIFAR Speedrun (& specification gaming)

rohuang, kaivu, zef and leni

20 Jul 2026 19:54 UTC

29 points

0 comments6 min readLW link

(fulcrum.inc)

Agents are under-elicited: A case study in optimization tasks

zef, kaivu, leni and rohuang

18 Jun 2026 2:39 UTC

17 points

1 comment7 min readLW link

(fulcrum.inc)

Inverse Rubric Optimization: A testbed for agent science

zef, leni, kaivu and rohuang

11 Jun 2026 1:44 UTC

10 points

2 comments1 min readLW link

(fulcrum.inc)

Tracking Difficulty with Feature Portfolios

kaivu, leni, zef and rohuang

19 May 2026 2:25 UTC

23 points

0 comments5 min readLW link

Benchmarking Real Work

kaivu, leni, rohuang and zef

16 May 2026 20:43 UTC

30 points

2 comments4 min readLW link

The bitter lesson for software

zef, rohuang and kaivu

16 Mar 2026 23:38 UTC

15 points

3 comments2 min readLW link

(fulcruminc.substack.com)

More is different for intelligence

zef, rohuang and kaivu

7 Mar 2026 0:02 UTC

17 points

0 comments2 min readLW link

(fulcruminc.substack.com)

The culture and design of human-AI interactions

zef16 Jan 2026 17:11 UTC

2 points

0 comments4 min readLW link

(bloodsteel.substack.com)

Should you be posting on the open internet

zef6 Jan 2026 15:50 UTC

22 points

9 comments2 min readLW link

2025 Letter

zef2 Jan 2026 13:57 UTC

10 points

0 comments14 min readLW link

(zephyyr.substack.com)

Personalization Requires Data

zef31 Dec 2025 0:45 UTC

3 points

2 comments2 min readLW link

(www.uzpg.me)

Introducing Lunette: auditing agents for evals and environments

zef, leni and kaivu

15 Dec 2025 23:17 UTC

23 points

0 comments1 min readLW link

(fulcrumresearch.ai)

Dense reconstruction is the scaffold of machine learning

zef19 Nov 2025 17:21 UTC

3 points

0 comments4 min readLW link

(bloodsteel.substack.com)

Automated real time monitoring and orchestration of coding agents

zef, kaivu and leni

23 Oct 2025 22:12 UTC

8 points

0 comments2 min readLW link

(fulcrumresearch.ai)

AI agents and painted facades

leni, zef and kaivu

30 Aug 2025 23:13 UTC

38 points

3 comments2 min readLW link

(fulcrumresearch.ai)

Takes and loose predictions on AI progress and some key problems

zef10 May 2025 10:11 UTC

5 points

0 comments5 min readLW link

(halcyoncyborg.substack.com)

The machine has no mouth and it must scream

zef8 Mar 2025 16:40 UTC

80 points

1 comment7 min readLW link

(zephyyr.substack.com)

[Question] Resources to see how people think/approach mathematics and problem-solving

zef27 Mar 2023 19:12 UTC

7 points

2 comments1 min readLW link

List of links for getting into AI safety

zef4 Jan 2023 19:45 UTC

6 points

0 comments1 min readLW link