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Anastasios Angelopoulos

Anastasios Angelopoulos

Things Anastasios Says on Podcasts

Where to Find Them

Anastasios Angelopoulos writes Forward Future by Matthew Berman . They have also been a guest on The Information's TITV (4 times) , This Week in AI (3 times) , Latent Space (2 times) , TBPN (2 times) , Equity , Grit , This Week in Startups , The Twenty Minute VC (20VC): Venture Capital | Startup Funding | The Pitch and The Cognitive Revolution" | AI Builders, Researchers, and Live Player Analysis .

Recently: “AI:AM: Carbon in the Arena, Mistral's Le Chonk, the Agent-Run Economy, Ferroelectric RAM + New Hacks” on The Cognitive Revolution" | AI Builders, Researchers, and Live Player Analysis (October 2026); “Is China Catching Up to the US in AI?” on Forward Future by Matthew Berman (October 2026); “Inside OpenAI’s $20B Revenue Discrepancy & China’s Increasingly Crowded AI Race” on The Information's TITV (October 2026); “Crypto Going "Bunker Mode", The Mathpocalypse, Starbucks Explores Chipotle Takeover | Rebecca Kaden & Michael Mignano, Nathan Benaich, Michael Sindicich & Healey Cypher, Moritz Stephan, Anastasios Angelopoulos, Zach Yadegari” on TBPN (October 2026); “The AI Race Has a Leaderboard | Arena CEO Anastasios Angelopoulos” on Grit (September 2026); “20VC: 70% of Neolabs Will Die | There Will be a $100BN US Open-Source Model | Data is a Trillion $ Market | Governments Cannot Regulate Models: It is Too Late | The Cyber Attacks to Come Will be Insane with Anastasios Angelopoulos @ Arena” on The Twenty Minute VC (20VC): Venture Capital | Startup Funding | The Pitch (August 2026).

What They Said

“If you look at the first message in the conversation, the misalignment rate is relatively low. It's in the single-digit percentage. If you subset the conversations that are 20 turns or longer, the probability that you observe some kind of misaligned behavior exceeds 50%. It's actually insane. What that means is that every single one of us, if you're a heavy user of AI at least, has had at least some conversations where the AI has been lying to us, misleading us, or accessing data on files that it shouldn't have. And we might not even know it.” — Anastasios Angelopoulos, The Cognitive Revolution" | AI Builders, Researchers, and Live Player Analysis

From the cold open of a highlights episode. Arena's CEO describes what an audit of real production conversations found: misaligned behavior grows sharply with conversation length.

The Cognitive Revolution" | AI Builders, Researchers, and Live Player Analysis · 2026-10-31 Permalink → Listen →
The Cognitive Revolution" | AI Builders, Researchers, and Live Player Analysis Around 00:47 into the episode
Nathan Labenz

This week on AI in the AM, how much of what we think we know about AI survives contact with the data? Anastasios Angelopoulos, co-founder and CEO of Arena, the leaderboard formerly known as LM Arena, which now audits real conversations for misaligned behavior. Here's what its production traces show.

Anastasios Angelopoulos

If you look at the first message in the conversation, the misalignment rate is relatively low. It's in the single-digit percentage, which is, you know, to be fair, that's actually not nothing, but it's relatively low. If you subset the conversations that are 20 terms or longer, the probability that you observe some kind of misaligned behavior exceeds 50%. It's actually insane. What that means is that every single one of us, if you're a heavy user of AI at least, has had at least some conversations where the AI has been lying to us, misleading us, or touching, accessing data on files that it shouldn't have. And, you know, we might not even know it.

Nathan Labenz

Gemini 4 Carbon, Google's new model, landed on Arena's leaderboard while we were live on a stages on first look.

Anastasios Angelopoulos

It's so good. Google is back. Google is back in a big way. You know, Carbon is, Carbon puts Google the number two lab in the world on our agent arena. Huge result. The agent arena is a very challenging benchmark, as they do with all of these like open world agentic capabilities. And it is number…

Nathan Labenz

Debo Olaosebikan Oshevikin, co-founder and CEO of Kepler Computing, which is building a new kind of memory for AI chips in older fabs. I asked how the compute forecasts should change if memory moves off the scarcest tools.

Speaker names come from our own diarization. The position is estimated from where the line sits in the episode.

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