Bret Taylor

CEO & Co-Founder, Sierra · 1 appearance on the record.

computed by AI from the episodes · how this works → · full disclaimer →

founderexecutiveengineer@btaylor ↗LinkedIn ↗bret.appspot.com ↗Wikipedia ↗

Bret Taylor is the CEO and co-founder of conversational AI startup Sierra and chairs the board of OpenAI. He previously served as co-CEO of Salesforce, CTO of Facebook, and co-created Google Maps.

34statements → 17claims → 4claims resolved → 75%fully supported → 3.71/5average certainty → 2.62/5average debate potential → 4.1/5argument clarity · the sources → 127said about them ↓

3 supported 0 partly supported 1 contradicted 4 not yet assessed 9 not checkable as stated how the 17 claims stand · each chip opens the sources

13 predictions · 4 assertions · 8 opinions · 8 insights · 1 disclosure · every statement was checked. The predictions and assertions are the 17 claims: statements the public record can support or contradict. 4 are resolved, 4 are not yet assessed, and 9 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 Bret 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

Prediction Held up

Bret Taylor: Consolidation ahead for AI pre-training companies

“I think we'll see consolidation of companies pre-training their own models you know, and I think that the cost structure of the tools and applications companies are different and perhaps more sustainable.”

Bret Taylor Oct 2, 2024 ▶ 44:15 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Their most notable contradicted claim

Prediction Didn’t hold up

Taylor: Having an AI agent will be essential by 2025

“We like to say like in 1995, the way you existed digitally as a business to have a website in 20, 25, the way you will exist digitally is to have an AI agent.”

Bret Taylor Oct 2, 2024 ▶ 48:10 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Expressed certainty vs assessment result

none yet certainty 1

none yet certainty 2

100% certainty 3

50% certainty 4

100% certainty 5

weighted support: a fully supported claim counts one, a partly supported claim counts half. Each filled bar is clickable and opens exactly those claims; "none yet" means nothing said at that certainty level has resolved yet

Argument clarity: do they answer the question? how? →

4.1 / 5 directness 4.1 · coherence 4.5 · precision 3.9 · compression 3.6

redirected or did not address 5 of 44 assessed questions (11%). Watch them ▸

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? →

226 words/min while actually speaking · 27.1 um and uh per 1k words · 11 false starts per 1k · 37.3% of pauses land inside a clause

Measured by listening to the audio itself: 11,646 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 →

How the interview went all their pushback → series average →

Across 1 rated episode:

host pushback ▾ 4/10

pushed back at the host ▾ 2/10

setup questions received 28%

host pushback: the hardest questions Harry asked, tap to play ▶ 7:23“Are we in peak AI and is this the ultimate sign of a bubble?” ▶ 10:06“Can I ask, is it not different in the way that the risk was priced in?” ▶ 29:18“How does one hold dual priorities of chasing AGI and building a great consumer or enterprise product at the same time?”

when Bret pushed back ▶ 13:27“I don't believe that will happen personally.” ▶ 10:35“I think it's a reasonable point and it's as a venture capitalist makes a ton of sense. You're thinking about it that way. I, you know, I'm more thinking about it as the impact on t…”

What they said34 What others said127 Episodes1

Everything Bret Taylor said on 20VC that made the record, most notable first. Filter by type, assessment or year in the ledger →

Opinion

Bret Taylor: AI pre-training outside AGI labs wastes capital

“Unless you are an AGI research lab, doing pre-training on a model I believe is just burning capital.”

Bret Taylor Oct 2, 2024 ▶ 0:07 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Opinion

Bret Taylor: The AI market is currently in a financial bubble

“I think we are in a bubble.”

Bret Taylor Oct 2, 2024 ▶ 7:26 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Open · timeframe Oct 2029

Taylor: AI will yield a trillion-dollar consumer giant and 10+ public companies

“We will look back and laugh at some of the excess, but I'm confident we will have, you know, a brand defining and likely trillion dollar consumer company come out of this. 10 plus enterprise software companies that are enduring, you know, public companies comi…”

Bret Taylor Oct 2, 2024 ▶ 9:27 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Not checkable as stated

Bret Taylor: Commercial AI market will mirror cloud software structure

“I actually think the AI market commercially will play out like the cloud market did over the past 20 years.”

Bret Taylor Oct 2, 2024 ▶ 13:38 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Opinion

Bret Taylor: Smart AI models won't alter enterprise software buying habits

“And so I think this idea that somehow the way the world wants to buy software will change because these models are really smart. Doesn't resonate with me.”

Bret Taylor Oct 2, 2024 ▶ 17:09 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Not checkable as stated

Taylor: Enterprise spending on AI professional services will drop as software matures

“I think there's probably some short term professional services spend that reflects the lack of the maturity of the AI applications market right now. You know, and I think that when there are solutions like Sierra and others for specific domains available, you …”

Bret Taylor Oct 2, 2024 ▶ 20:52 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Opinion

Bret Taylor: Companies needing standard models should simply fine-tune Llama or Mistral

“You know, I think that in that market probably if you need a model like that, you should download llama. That's the answer. It's like, you don't need much of a cheat sheet on that, you know, and or maybe Mr. All, but pick one of the open source models that are…”

Bret Taylor Oct 2, 2024 ▶ 22:42 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Insight

Bret Taylor: Iterative deployment is the most responsible path to AGI

“I believe the most responsible way to develop AGI is responsible iterative deployment. And the reason for that is I believe that as you're thinking about things like the societal impact access to this technology and the safety side of AGI as well, that the, Be…”

Bret Taylor Oct 2, 2024 ▶ 26:06 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Not checkable as stated

Taylor: AI progress won't stall because data, compute, and algorithms alternate bottlenecks

“In any one of those, you could probably make a very rational intellectual case that we're gonna hit a wall, but then you have the two others. And I don't think you can make the case for all three that they're all coming up on a wall. And I think like any big s…”

Bret Taylor Oct 2, 2024 ▶ 28:30 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Opinion

Taylor: ChatGPT is the most important tech product of the past decade

“At least my understanding why it has a sort of a goofy name is it was a research preview that turned out to be the most important product of the past decade, you know, and I think that, you know, one of the things I think about is, wow, what an important mecha…”

Bret Taylor Oct 2, 2024 ▶ 30:29 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Insight

Taylor: Most companies should avoid model pre-training and align costs with usage

“Most companies should be applying AI to build solutions and most companies should have relatively modest training costs and most of their costs should be correlated with inference, which should be correlated with revenue and usage of your product.”

Bret Taylor Oct 2, 2024 ▶ 34:21 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Open · timeframe Oct 2029

Bret Taylor: AI inference costs will decrease following Moore's Law trajectory

“I'm incredibly optimistic that just the cost of running AI will could probably track something like Moore's law.”

Bret Taylor Oct 2, 2024 ▶ 36:24 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Held up

Bret Taylor: Consolidation ahead for AI pre-training companies

Bret Taylor Oct 2, 2024 ▶ 44:15 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Open · timeframe Oct 2029

Taylor: Conversational AI will replace web and app clicks within five years

“And as a consequence, you know, I think that, you know, if you fast forward four or five years, when you're interacting with any of the consumer brands, you work with your insurance company, your phone company a car rental company, you will probably be having …”

Bret Taylor Oct 2, 2024 ▶ 47:34 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Didn’t hold up

Taylor: Having an AI agent will be essential by 2025

“We like to say like in 1995, the way you existed digitally as a business to have a website in 20, 25, the way you will exist digitally is to have an AI agent.”

Bret Taylor Oct 2, 2024 ▶ 48:10 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Open · timeframe Oct 2029

Bret Taylor: Conversational AI will become the dominant computer interface

“And my thesis is just like touch screens have come to dominate Our experience with computers because of convenience, you can have a conversation in so many different places. You don't need an instruction manual. I think it will be the main way we work with com…”

Bret Taylor Oct 2, 2024 ▶ 51:10 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Not checkable as stated

Taylor: Smartphones will remain the primary interface for conversational AI

“So in the short term, my intuition is that the combination of a smartphone with Ray-Ban glasses or AirPods or the like probably, you know, meaning you might need to look at your screen less than you do today. But my intuition is because of the prevalence of sm…”

Bret Taylor Oct 2, 2024 ▶ 52:17 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Insight

Taylor: Companies must manage AI mistakes operationally rather than eliminating them

“Stop putting, you know, AI software in the bucket of computers and that rule set and how you deal with it to try to get to, you know, five nines of repeatability and say, okay, this is actually gonna be, A really creative, really impactful, much lower cost sol…”

Bret Taylor Oct 2, 2024 ▶ 1:04:11 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Prediction Not checkable as stated

Taylor: Defining AI companies will be applications, not base models

“The focus on hardware and models and not enough focus on the applications of AI. I think many of the defining companies in AI will be delivering consumer and business solutions that happen to be powered by AI, not just the models themselves.”

Bret Taylor Oct 2, 2024 ▶ 1:09:17 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Opinion

Taylor: Very few investors have the patience they claim on their websites

“While investors claim to be long-term, very few have the patience that they extol on their website, you know, and it really requires this relentless focus on the future.”

Bret Taylor Oct 2, 2024 ▶ 1:15:05 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Opinion

Taylor: AI bubble will rhyme with dot-com era, where excess was justified

“And I think the AI bubble will rhyme with the dot com bubble. And I believe with the benefit of hindsight, Most of the excess of the.com bubble might have been justified.”

Bret Taylor Oct 2, 2024 ▶ 7:40 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Disclosure

Bret Taylor: Sierra fine-tunes third-party models rather than pre-training

“So at Sierra, which is my company, we make a solution. We're not doing pre-training where, you know, we're fine tuning other people's models to build this solution.”

Bret Taylor Oct 2, 2024 ▶ 16:18 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Insight

Bret Taylor: Software is shifting from fixed rules to goals and guardrails

“We like to say software's going from the age of rules to the age of goals and guardrails.”

Bret Taylor Oct 2, 2024 ▶ 55:21 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Assertion Supported

Taylor: Sierra customers already use AI agents for sales and churn management

“Our customers already are using it for revenue generation, sales subscription churn management for subscription services, things like that.”

Bret Taylor Oct 2, 2024 ▶ 59:29 Bret Taylor: Why Pre-Training is for Morons & Companies Will Build Their Own Software | E1209 · 20VC with Harry Stebbings

Show 10statements(10 left)

The other half of the tape: Bret Taylor's own voice is left out of every number here. Other people bring the name up 119 times in 33 episodes on 20VC. 8 statements on the record name them. every mention, with the transcript →

Who brings them up most Harry Stebbings 57 Jason Lemkin 11 Cliff Weitzman 11 Reggie Marable 8 Clay Bavor 7 Rory O'Driscoll 4 Zico Kolter 2 Everett Randle 2

Statements about Bret Taylor, by other people (8)

Opinion

Stebbings: OpenAI should acquire Sierra and make Bret Taylor CEO

“It's the best thing for OpenAI not to buy Sierra, incorporate that as a customer support product, and have Brett Taylor come in as the day-to-day CEO, and Sam can be fundraiser, Sam can be master of...”

Harry Stebbings Apr 2, 2026 ▶ 15:33 OpenAI Kills Sora & Hits $100M ARR on Ads | Oura Going Public & Whoop Raises at $10BN · 20VC with Harry Stebbings

Assertion Supported

O'Driscoll: Bret Taylor Forced Elon Musk to Complete $44B Twitter Acquisition

“For the second time in the last five years, he totally wanted as board chairman of Twitter, where he jammed that down Elon's throat for forty four billion dollars despite his opposition, and he won here today because he unraveled the mess and set it all up for…”

Rory O'Driscoll Oct 30, 2025 ▶ 8:05 OpenAI Restructuring: Who Wins and Who Loses & Mercor Raises $350M at a $10BN Valuation · 20VC with Harry Stebbings

Assertion Not checkable as stated

Sierra uses six-to-ten-page written memos instead of decks for board meetings

“As for running the board meetings themselves, we don't have board decks, we have board memos. So Brett and I write a usually six to 10 page memo.”

Clay Bavor Jul 4, 2026 ▶ 39:52 Open Models vs Frontier Models: Who Actually Wins? | The $100K Token Budget Every Engineer Will Need · 20VC with Harry Stebbings

Opinion

Marable: Sierra Co-Founder Bret Taylor Is an "Apex Predator" Salesperson

“So I consider Brett one of the, I call him the apex predator. He's one of the best salespeople I've ever been around.”

Reggie Marable May 2, 2025 ▶ 7:19 20Sales: Sierra: Inside Silicon Valley's Fastest Growing Sales Machine & How to Prospect, Outbound and Close Enterprise Deals in AI

Assertion Not checkable as stated

Sierra founders personally monitored every AI customer conversation during Black Friday

“When we, in our first Black Friday, Cyber Monday with a set of retailers, one of one of our lead engineers, our head of operations, me or Brett, was in real time personally reading every single conversation that our agents were having, because we wanted to mak…”

Clay Bavor Jul 4, 2026 ▶ 45:04 Open Models vs Frontier Models: Who Actually Wins? | The $100K Token Budget Every Engineer Will Need · 20VC with Harry Stebbings

Assertion Not checkable as stated

Sierra co-founder Bret Taylor still writes production code for the startup

“Brett is actually still an extraordinarily capable software engineer. It's remarkable. So, you know, some of the code that is in production, right, he has written”

Clay Bavor Jul 4, 2026 ▶ 26:45 Open Models vs Frontier Models: Who Actually Wins? | The $100K Token Budget Every Engineer Will Need · 20VC with Harry Stebbings

Disclosure

Kolter: Bret Taylor invited him to join OpenAI board via email

“I got, actually the day before I started as department head, I got an email from Brett, the chair of the board, just saying, hey, do you want to talk about maybe joining the OpenAI board?”

Zico Kolter Sep 4, 2024 ▶ 1:00:50 Zico Kolter: OpenAI's Newest Board Member on The Biggest Questions and Concerns in AI Safety | E1197 · 20VC with Harry Stebbings

Disclosure

Clay Bavor details recent operational debate with Sierra co-founder Bret Taylor

“I was on one side. It was like, I think we need better kind of process and structure around this thing. Brett was on the side of people and maybe we need different leaders or a different leader in this space. The answer is with most things like turned out to b…”

Clay Bavor Jul 4, 2026 ▶ 1:00:21 Open Models vs Frontier Models: Who Actually Wins? | The $100K Token Budget Every Engineer Will Need · 20VC with Harry Stebbings