Anastasios Angelopoulos
Co-Founder and CEO, Arena · 1 appearance on the record.
computed by AI from the episodes · how this works → · full disclaimer →
founderexecutivescientistauthor@ml_angelopoulos ↗LinkedIn ↗angelopoulos.ai ↗
He co-founded Arena, the crowdsourced human-preference benchmarking platform for AI foundation models originating out of UC Berkeley. A former UC Berkeley postdoctoral researcher, he specializes in reliable AI and conformal prediction.
6 supported 2 partly supported 0 contradicted 5 not yet assessed 12 not checkable as stated how the 25 claims stand · each chip opens the sources
13 predictions · 12 assertions · 3 opinions · 8 insights · 3 disclosures · every statement was checked. The predictions and assertions are the 25 claims: statements the public record can support or contradict. 8 are resolved, 5 are not yet assessed, and 12 name no date, number or outcome precise enough to check. Everything else (opinions, insights, what ifs, disclosures) can never be settled by the record, so it carries no assessment.
The record, in short
What the tape says about how Anastasios argues and how the claims held up. Everything they said, and everything said about them, is in the tabs below.
Their most notable supported claim
Argument clarity: do they answer the question? how? →
answered every one of 19 assessed questions directly
This is a score against a rubric. It is not a rank. Every host question → answer exchange is scored with names hidden on directness, coherence, precision and compression, 1–5 each, on meaning alone: disfluencies are ignored, and only raw unedited episodes count. This is the score that measures thought. Every scored exchange, scores shown → · The rubric and its checks →
How they sound: speaking style how? →
266 words/min while actually speaking · 11.6 um and uh per 1k words · 9.4 false starts per 1k · 26.3% of pauses land inside a clause
Measured by listening to the audio itself: 9,114 words across 1 episode of raw-level tape, transcribed verbatim with every um and uh kept, each one attributed only where the alignment onto our timed stream is unambiguous. These are measurements of speaking style. We do not rank them: across this corpus, fluency and argument quality are nearly uncorrelated (ρ≈0.2), and smooth talking does not signal clear thinking. How it's measured →
Everything Anastasios Angelopoulos said on 20VC that made the record, most notable first. Filter by type, assessment or year in the ledger →
The other half of the tape: Anastasios Angelopoulos's own voice is left out of every number here. Other people bring the name up 1 time in 1 episode on 20VC. every mention, with the transcript →
Who brings them up most Harry Stebbings 1
Every mention by year
Appearances (1)
| Episode | Date | Speaking time |
|---|---|---|
| Arena CEO: There Will be a $100BN US Open-Source Model & Data is a Trillion Dollar Market | Aug 2, 2026 | 41m |