LMSYS

organization on 9 shows · 21 statements across 9 episodes · said 60 times in 23 episodes since 2024

Latent Space 14 No Priors 1 Lenny's Podcast Sourcery the a16z Podcast Big Technology All-In TBPN 20VC

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Latent Space 14No Priors 1

2026 1 mention in 1 episode
2025 9 mentions in 6 episodes 2 per episode
2024 5 mentions in 3 episodes 2 per episode

every mention on every show, scene by scene, with the transcript →

21 statements about LMSYS, every show

LATENT SPACE Assertion Partly supported
Shawn Wang: Fixed-capability LLM inference costs drop 100x to 1000x annually
“In language models, it is roughly 100 to a thousand times every 12 to 18 months for the same given level of LMSYS ELO.”
Shawn Wang Jun 1, 2026 ▶ 28:15 Inside xAI: Building Grok Imagine in 3 Months, Videogen vs World Models, and Video Agents— Ethan He
LATENT SPACE Disclosure
Angelopoulos: Arena Dropped 'LM' to Broaden Beyond Language Models
“So, so we wanted to maybe broaden a little bit. And we were the first Serena, so we feel like let's kind of try to own that.”
Anastasios Angelopoulos Dec 31, 2025 ▶ 0:57 [State of Evals] LMArena's $1.7B Vision — Anastasios Angelopoulos, LMArena
LATENT SPACE Assertion Supported
Wu: OpenAI was first to launch stateful responses API
“Obviously we were the first one to launch responses API, but like a couple of other people have kind of adopted, I think Grok has it in their API. I think I saw LMSYS just did something”
Sherwin Wu Oct 7, 2025 ▶ 15:46 DevDay 2025: Apps SDK, Agent Kit, MCP, Codex and why Prompting is More Important than Ever
LATENT SPACE Prediction Open · timeframe Jul 2028
Lambert: LMSYS is probably setting up a deep research arena
“I mean, they're probably setting up a deep research arena, because that's the data that, I mean, if I was open AI working on deep research, that's the data that I want, and there are competitors, and LMSYS is the entity that has the market placement to set it …”
Nathan Lambert Jul 31, 2025 ▶ 15:03 The RLVR Revolution — with Nathan Lambert (AI2, Interconnects.ai)
Lambert: Meta withholding its leading benchmark model is bad execution
“But to be a model that claims to be open and then not release the model that is your leading claim is just, like, that is, like, bad execution.”
Nathan Lambert Jul 31, 2025 ▶ 1:13:36 The RLVR Revolution — with Nathan Lambert (AI2, Interconnects.ai)
NO PRIORS Assertion Not checkable as stated
Chen: Researchers Degrade AI Factuality Just to Boost LMSYS Rankings
“A lot of researchers, they'll tell us that their VPs make them focus on increasing their rank on LMSYS. And so I've had researchers explicitly tell me that they're okay with making their models worse. Add factuality works at following instructions as long as i…”
Edwin Chen Jul 24, 2025 ▶ 27:09 No Priors Ep. 124 | With SurgeAI Founder and CEO Edwin Chen
LATENT SPACE Assertion Not checkable as stated
Beauchamp: 5,000 completions needed to accurately ELO rank community models
“We think it takes about 5000 completions to get an accurate signal.”
William Beauchamp Jan 26, 2025 ▶ 48:50 Outlasting Noam Shazeer, Crowdsourcing Chai AI w/ 1.4m DAU — with William Beauchamp, Chai Research
Angelopoulos: Static benchmarks are intrinsically unable to evaluate generative models
“Static benchmarks are intrinsically, to some extent, unable to measure generative model performance. And the reason is because you cannot Pre-annotate all the outputs of a generative model. You change the model. It's like the distribution of your data is chang…”
Anastasios Angelopoulos Nov 1, 2024 ▶ 6:40 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Assertion Not checkable as stated
Chiang: Coding questions drive 20% to 30% of Chatbot Arena usage
“We do see a lot of like developers come to the site asking polling questions. Only 30%.”
Wei-Lin Chiang Nov 1, 2024 ▶ 10:36 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Assertion Not checkable as stated
Chiang: Chatbot Arena almost died after launch due to low engagement
“At some point, almost died. Because as you can imagine, this leaderboard depends on user, like part of, like community engagement participation. If no one comes to vote, Tomorrow then no deal.”
Wei-Lin Chiang Nov 1, 2024 ▶ 11:10 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Assertion Partly supported
Angelopoulos: LMSYS controls for markdown and lists in Arena rankings
“We have, you know, five, six different style components that have to do with markdown headers and bulleted lists and so on that we add here.”
Anastasios Angelopoulos Nov 1, 2024 ▶ 16:24 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Disclosure
Angelopoulos: LMSYS considers default style control but avoids imposing opinions
“We consider that we're still actively considering it. It's just, you know, once you make that step, once you take that step, you're introducing your opinion. And I'm not, you know, why should our opinion be the one? That's kind of a community choice. We could …”
Anastasios Angelopoulos Nov 1, 2024 ▶ 18:27 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Disclosure
Angelopoulos: LMSYS wants to integrate live code execution in Chatbot Arena
“For example, it'd be great if we could execute code within Arena. It'd be fantastic. We want to do it.”
Anastasios Angelopoulos Nov 1, 2024 ▶ 21:49 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Assertion Supported
Angelopoulos: OpenAI o1 crushed Chatbot Arena, proving the benchmark isn't saturated
“So there's this model and it crushed the benchmark. You know, it's just like really like a big gap. And what that's telling us is that it's not saturated yet. And so it's still measuring some signal that was encouraging point.”
Anastasios Angelopoulos Nov 1, 2024 ▶ 27:20 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Assertion Not checkable as stated
Angelopoulos: Five-model selection bias is tiny compared to voter variability
“We don't do that right now, partially because we kind of have know from simulations that the amount of selection bias you incur with these five things is just not huge. It's not huge in comparison to the variability that you get from the, from just regular hum…”
Anastasios Angelopoulos Nov 1, 2024 ▶ 31:47 In the Arena: How LMSys changed LLM Benchmarking Forever
Angelopoulos: Live voter data asymptotically eliminates pre-release ELO bias
“What happened is that over time, because we're getting new data, it'll get adjusted down. So if there's any bias that gets introduced at that stage in the long run, it actually doesn't matter because asymptotically, basically like in the long run, there's way …”
Anastasios Angelopoulos Nov 1, 2024 ▶ 32:16 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Assertion Not checkable as stated
Chiang: There are currently no good benchmarks for evaluating LLM routers
“Right now, currently, there seems to be the, one of the end point when we developed this project was like, there's just no good benchmark for a router.”
Wei-Lin Chiang Nov 1, 2024 ▶ 35:57 In the Arena: How LMSys changed LLM Benchmarking Forever
Angelopoulos: Highly effective LLM routers only need simple heuristics like length
“Well, I think that you can build a very, very simple router that is very effective. So let me give you an example. You can build a great router with one parameter, and the parameter is just like, I'm gonna check if my question is hard, and if it's hard, then I…”
Anastasios Angelopoulos Nov 1, 2024 ▶ 36:33 In the Arena: How LMSys changed LLM Benchmarking Forever
LATENT SPACE Disclosure
Angelopoulos: Chatbot Arena is decoupling from LMSYS as co-creators shift focus
“Sort of Chatbot Arena has, of course, like, kind of become its own thing, and Lianmin and Ying, who are, you know, created LMSYS, have kind of, like, moved on to working on SGLang, and now They're doing other projects that are sort of originating from LMSS. An…”
Anastasios Angelopoulos Nov 1, 2024 ▶ 38:23 In the Arena: How LMSys changed LLM Benchmarking Forever
Yi Tay: Distilled open-source model variants disappeared after failing to climb LMSYS
“When people realize that, like, this, like, turning on the GPT-IV tab and running some DPO is not going to give them the reward signal that they want anymore, right? Then all these variants gone, right? You know, there was this era where there's, wow, there's …”
Yi Tay Jul 5, 2024 ▶ 2:01:00 The 10,000x Yolo Researcher Metagame — with Yi Tay of Reka
Lambert: Chatbot Arena is the best available evaluation benchmark for LLMs
“I have, if we make it to evaluation, I'd pretty much say that Chat Arena is the best limited evaluation that people have to learn how to use language models, and like, It's very valuable data”
Nathan Lambert Jan 11, 2024 ▶ 52:38 The Origin and Future of RLHF: the secret ingredient for ChatGPT - with Nathan Lambert

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