| 10,000× | “10,000 times” | Adhikari: LIGO mirrors store vibrational energy 10,000 times longer than glass | Rana Adhikari | Sep 15, 2017 | Supported |
| 3,000× | “3000 times” | Jumper: Protein sequence discovery outpaces structure determination by 3,000 times | John Jumper | Jul 15, 2025 | Supported |
| 1,000× | “1000 X” | Wang: Agentic loops using 1,000,000x more tokens are AI's biggest opportunity | Alexandr Wang | Jul 29, 2026 | — |
| 500× | “500 X” | Bromberg: ARDC returned 500x on DEC over 11 years | Andy Bromberg | Mar 9, 2018 | Supported |
| 400× | “400 X” | Tan: Returning to Coding with AI Yields 400x Output | Garry Tan | May 8, 2026 | — |
| 200× | “200 times” | Tan: Groq runs transcription 200 times faster than Whisper v1 | Garry Tan | Feb 21, 2026 | Contradicted |
| 150× | “150 times” | Epstein: Segment increased contract values 150x by anchoring quotes at $120,000 | Aaron Epstein | Dec 15, 2022 | Supported |
| 150× | “150 times” | Zeevi: Gut Microbes Carry 3 Million Genes, 150x the Human Genome | David Zeevi | Aug 22, 2018 | Supported |
| 100× | “hundred X” | Tom Blomfield says AI will fulfill surging global demand for software | Tom Blomfield | May 9, 2025 | — |
| 100× | “hundred times” | Legora's 30 engineers outship legacy legal tech incumbents with thousands of developers | Max Junestrand | Aug 26, 2025 | — |
| 100× | “hundred times” | Habib: OpenAI's 1.3B InstructGPT beat the 100x larger GPT-3 via RLHF | Raza Habib | Feb 28, 2023 | Supported |
| 100× | “hundred X” | Gil says passing on Lyft's $90M Series C was a major mistake | Elad Gil | Mar 8, 2018 | — |
| 100× | “hundred X” | Levy: Angel Investors Waste Time Negotiating Downside Protection | Carolynn Levy | Mar 6, 2018 | — |
| 100× | “hundred X” | Culver: Producing a TV show is roughly 100x more expensive than a quality podcast | Leah Culver | Jan 5, 2018 | — |
| 97× | “97 times” | Altman: Great startup execution requires saying no 97% of the time | Sam Altman | Mar 17, 2017 | — |
| 50× | “50 times” | Flora: nVision founder Surbhi Sarna faced over 50 investor rejections initially | Brad Flora | Mar 29, 2023 | — |
| 50× | “50 X” | Buchheit: Wufoo angel investment returned roughly 50x | Paul Buchheit | Oct 24, 2018 | — |
| 50× | “50 X” | Gil says passing on Lyft's $90M Series C was a major mistake | Elad Gil | Mar 8, 2018 | — |
| 44× | “44 X” | Buchheit: Wufoo angel investment returned ~44x on SurveyMonkey acquisition | Paul Buchheit | Mar 7, 2018 | — |
| 20× | “20 times” | Tan: Write markdown teaching LLMs to code rather than calling LLMs | Garry Tan | Jun 25, 2026 | — |
| 20× | “20 times” | Fagiri: An AptDeco competitor raised 20x more funding before folding | Reham Fagiri | Oct 11, 2016 | Supported |
| 10× | “10 X” | Franceschi: CEOs Break Corporate Process 10x Easier Than Executives | Pedro Franceschi | Jun 10, 2026 | — |
| 10× | “10 X” | Tan: Asking for 10x value at 2x effort unlocks ambitious products | Garry Tan | May 8, 2026 | — |
| 10× | “10 X” | Tan: Untested AI-generated code is 10x worse than human-written code | Garry Tan | May 8, 2026 | — |
| 10× | “10 times” | Vuong: Robotics evaluation difficulty scales superlinearly with task duration | Quan Vuong | Apr 16, 2026 | — |
| 10× | “10 x” | Mellata: OpenAI model upgrades cut Variance's pilot costs tenfold | Karine Malata | Mar 31, 2026 | — |
| 10× | “10 x” | Epstein: Blanket '10x' startup landing page metrics feel fabricated | Aaron Epstein | Mar 6, 2026 | — |
| 10× | “10 X” | Tan: Groq is 10x cheaper than legacy Whisper for transcription | Garry Tan | Feb 21, 2026 | Partly supported |
| 10× | “10 times” | Taggar: Top 18-to-22-Year-Olds in 5 Years Will Have 'Off the Charts' Taste | Harj Taggar | Feb 6, 2026 | — |
| 10× | “10 times” | Ng: AI coding makes prototyping 10x faster, production only 50% faster | Andrew Ng | Jul 10, 2025 | — |
| 10× | “10 times” | Ng: Bad AI architecture decisions slow startups down by 10x, not 2x | Andrew Ng | Jul 10, 2025 | — |
| 10× | “10 times” | Musk: AI could expand the economy thousands or millions of times | Elon Musk | Jun 19, 2025 | — |
| 10× | “10 times” | Musk: Humanoid robots will outnumber humans five to tenfold | Elon Musk | Jun 19, 2025 | Open |
| 10× | “10 times” | Tom Blomfield says AI makes him 10x more productive than before | Tom Blomfield | May 9, 2025 | — |
| 10× | “10 X” | Tom Blomfield says AI will fulfill surging global demand for software | Tom Blomfield | May 9, 2025 | — |
| 10× | “10 x” | Blomfield: Claude Sonnet 3.7 configured DNS and Heroku, accelerating progress 10x | Tom Blomfield | Apr 25, 2025 | — |
| 10× | “10 X” | Pollak: Four maturing unlocks have created crypto's golden building era | Jesse Pollak | Sep 23, 2025 | — |
| 10× | “10 times” | Levie: B2B founders must master three essential strategy books | Aaron Levie | Sep 16, 2025 | — |
| 10× | “10 X” | Kaplan: AI training and inference will see 3x-10x yearly efficiency gains | Jared Kaplan | Jul 29, 2025 | Held up |
| 10× | “10 times” | Blomfield: Enterprise compliance features enable up to 10x higher pricing | Tom Blomfield | Jul 25, 2024 | — |
| 10× | “10 times” | Seibel: Delaying startup creation to upskill makes founders ten times stronger | Michael Seibel | Apr 14, 2023 | — |
| 10× | “10 times” | Seibel: Maximizing fundraising leads to lost control and impossible pivots | Michael Seibel | Jan 11, 2023 | — |
| 10× | “10 times” | Seibel: Second-time founders default to expert advice over talking to users | Michael Seibel | Sep 15, 2022 | — |
| 10× | “10 X” | Seibel: Downturns reveal the tiny group of smart players extracting capital | Michael Seibel | Sep 1, 2022 | — |
| 10× | “10 X” | Seibel: Operationally intensive startup founders must know numbers 10x better | Michael Seibel | May 6, 2022 | — |
| 10× | “10 X” | Seibel: Google's beta release standard is 10x higher than a startup MVP | Michael Seibel | Apr 20, 2022 | — |
| 10× | “10 X” | Seibel: Airbnb, Coinbase, and Stripe beat dominant incumbents by being 10x better | Michael Seibel | Jan 19, 2022 | — |
| 10× | “10 X” | Seibel: Portable digital gold like Bitcoin is 10x better than physical gold | Michael Seibel | Jan 19, 2022 | — |
| 10× | “10 x” | Hard-tech YC applicants have a 10x higher acceptance rate than others | Jared Friedman | Sep 20, 2019 | — |
| 10× | “10 X” | Collin: A first sales rep must generate 3x to 6x their compensation | Mathilde Collin | Oct 24, 2018 | — |
| 10× | “10 times” | Halligan: Modern startups win via 10x better go-to-market, not product | Brian Halligan | May 8, 2019 | — |
| 10× | “10 times” | Saroya: Pure lead-gen businesses are not durable long term | Karn Saroya | Feb 27, 2019 | — |
| 10× | “10 X” | Engineering challenges require seasoned mentors who have seen problems firsthand | Shola Akinlade | Oct 16, 2018 | — |
| 10× | “10 times” | Iorns: Scientific experiments often have 10x price differences for equivalent results | Elizabeth Iorns | Oct 3, 2018 | — |
| 10× | “10 times” | Iorns: Amgen's Migraine Drug Outperformed Market Predictions by 10x | Elizabeth Iorns | Oct 3, 2018 | Contradicted |
| 10× | “10 X” | Changing user email habits requires a 10x better value proposition | Mathilde Collin | Oct 3, 2018 | — |
| 10× | “10 X” | Mathilde Collin: Google Inbox was not 10x better than Gmail | Mathilde Collin | Oct 3, 2018 | — |
| 10× | “10 times” | Friedman: Y Combinator has grown 10x in size since 2010 | Jared Friedman | Jun 22, 2018 | — |
| 10× | “10 times” | Benjamin: Oxford quantum researchers achieve 99.9% gate fidelity | Simon Benjamin | May 25, 2018 | Supported |
| 10× | “10 X” | Bernstam: Auditing daily software that annoys you reveals prime startup opportunities | Tikhon Bernstam | Sep 8, 2017 | — |
| 10× | “10 X” | Ravisankar: Top '10x' developers are distinguished by strong business acumen | Vivek Ravisankar | Mar 30, 2018 | — |
| 10× | “10 times” | Buchheit: Bret Taylor rewrote Google Maps' JS frontend in one weekend | Paul Buchheit | Mar 7, 2018 | — |
| 10× | “10 times” | Manalac: Cold emails to reporters get no response 90% of the time | Kat Manalac | Feb 15, 2017 | — |
| 9× | “nine times” | Hockenmaier: 90% of growth advising is talking founders out of ideas | Dan Hockenmaier | Jun 26, 2019 | — |
| 8× | “eight X” | Tan: Meta's Muse Spark matches Claude Opus at one-eighth the cost | Garry Tan | Jul 29, 2026 | — |
| 7× | “seven times” | Caldwell: Most founders in recent YC batches are repeat applicants | Dalton Caldwell | May 12, 2023 | — |
| 6× | “six times” | Scholl: XB-1 Broke Sound Barrier Six Times With No Ground Boom | Blake Scholl | Jul 28, 2026 | Supported |
| 6× | “six times” | Ries: Foundation-owned companies are 6x more likely to reach year 50 | Eric Ries | May 22, 2026 | Partly supported |
| 6× | “six times” | Caldwell: Most founders in recent YC batches are repeat applicants | Dalton Caldwell | May 12, 2023 | — |
| 6× | “six X” | Collin: A first sales rep must generate 3x to 6x their compensation | Mathilde Collin | Oct 24, 2018 | — |
| 5× | “five times” | Garry Tan: Claude Code is an unlock that enables 5x faster coding | Garry Tan | Feb 6, 2026 | — |
| 5× | “five times” | Altman: OpenAI's o3 model cost dropped by 5x in one week | Sam Altman | Jun 21, 2025 | Supported |
| 5× | “five times” | Musk: Humanoid robots will outnumber humans five to tenfold | Elon Musk | Jun 19, 2025 | Open |
| 5× | “five times” | Caldwell: Most founders in recent YC batches are repeat applicants | Dalton Caldwell | May 12, 2023 | — |
| 5× | “five X” | Caldwell: Technical founding teams have 5x higher odds of a YC interview | Dalton Caldwell | May 12, 2023 | — |
| 5× | “five X” | Blomfield: 5% monthly growth is unlikely to yield breakout consumer success | Tom Blomfield | Jan 6, 2024 | — |
| 5× | “five X” | Hu: Niantic's employee headcount grew at least 5x year-over-year | Diana Hu | Aug 28, 2019 | Contradicted |
| 5× | “five times” | Saroya: Stylekick had 400,000 active users by its third YC interview | Karn Saroya | Feb 27, 2019 | — |
| 5× | “five times” | Petersen: Air Freight Is on Average 5x More Expensive Than Ocean Freight | Ryan Petersen | Aug 30, 2018 | Contradicted |
| 4× | “four times” | Massad: Replit was rejected from YC multiple times before Graham and Altman invited them | Amjad Masad | Apr 25, 2026 | — |
| 4× | “four times” | Palicha: Indian grocery purchase frequency is four times higher than in US | Aadit Palicha | Apr 18, 2025 | Partly supported |
| 4× | “four X” | Petersen sold his Amazon stock right before it 4x'd to buy a house | Ryan Petersen | Aug 30, 2018 | — |
| 3× | “three times” | Ng's teams rebuilt a codebase three times in one month using AI | Andrew Ng | Jul 10, 2025 | — |
| 3× | “three X” | Kaplan: AI training and inference will see 3x-10x yearly efficiency gains | Jared Kaplan | Jul 29, 2025 | Held up |
| 3× | “three times” | Epstein: Warm Intros Yield 2x to 3x Cold Email Conversion Rates | Aaron Epstein | Sep 12, 2024 | — |
| 3× | “three times” | Garry Tan: Airbnb Launched Three Times Before Getting Attention | Garry Tan | Jul 12, 2024 | Supported |
| 3× | “three times” | Mañalac: Airbnb launched three times before getting traction | Kat Mignalek | Feb 9, 2023 | Supported |
| 3× | “three X” | Seibel: FAANG retention relies on unvested equity being 3x your savings | Michael Seibel | Apr 20, 2022 | — |
| 3× | “three X” | Collin: A first sales rep must generate 3x to 6x their compensation | Mathilde Collin | Oct 24, 2018 | — |
| 3× | “three times” | VIPKID has grown to more than 60,000 teachers | Cindy Mi | Jan 16, 2019 | Supported |
| 3× | “three times” | Saroya: Stylekick had 400,000 active users by its third YC interview | Karn Saroya | Feb 27, 2019 | — |
| 3× | “three times” | Gootee: Non-technical co-founders make excellent early QA testers | Ralph Goody | Oct 10, 2018 | — |
| 3× | “three times” | Avni Patel Thompson applied to Y Combinator three times before being accepted | Avni Patel Thompson | Sep 21, 2017 | — |
| 3× | “three times” | A 3D-printed house tested three times stronger than cinder block homes | Brett Hagler | Apr 4, 2018 | Not publicly verifiable |
| 3× | “three X” | Gil: Most angel investors care too little about valuation | Elad Gil | Mar 8, 2018 | — |
| 3× | “three times” | Thompson applied to Y Combinator three times before being accepted | Avni Patel Thompson | Mar 2, 2018 | — |
| 3× | “three times” | Brockman: OpenAI's hybrid bot defeated pro player Arteezy 3-0 | Greg Brockman | Nov 8, 2017 | Supported |
| 3× | “three times” | Altman: Justin Kan achieved a billion-dollar exit on his third YC startup | Sam Altman | Aug 30, 2016 | Partly supported |
| 2× | “two X” | Tan: Asking for 10x value at 2x effort unlocks ambitious products | Garry Tan | May 8, 2026 | — |
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