Fundraising Fox

Daniel Han

Founder

Founder at Unsloth AI

San Francisco, California, United States

FoundedUnsloth AI Β· YC

About

Daniel Han previously worked at NVIDIA on algorithmic optimization and has contributed bug fixes to several open-source language models including Gemma, Llama, Mistral, and Phi. He maintains Hyperlearn, an open-source package for accelerating machine learning workflows.

LinkedIn β†—X / Twitter β†—
Latest on 𝕏

Daniel Han @danielhanchen

For folks asking why Q8_K_XL and not MXFP4 naming, DS4 uses MXFP4 for MoE layers & FP8 for most others. llama.cpp doesn't have native FP8 & Q8_0 != FP8. Q8_K_XL = MXFP4+BF16 (100% lossless) vs Q4_K_XL = MXFP4+Q8_0 (96% same top-1%) Folks saying FP8==Q8_0 as lossless are wrong. https://t.co/znfqqE9q0T

Jul 31, 2026 Β· β™₯ 84 Β· ⇄ 11

Daniel Han @danielhanchen

Unsloth UD quants for DeepSeek V4 Flash 0731 are out! UD-Q8_K_XL 162GB is fully lossless (MXFP4 + BF16) UD-Q4_K_XL 155GB 96% top-1% UD-Q3_K_XL 129GB 87% UD-IQ3_S 117GB 83% UD-Q2_K_XL 97GB 79% UD-IQ1_S 83GB 73% https://t.co/HKR0styM1N

Jul 31, 2026 Β· β™₯ 319 Β· ⇄ 35

Daniel Han @danielhanchen

My 2hr workshop on Open vs Closed models, reward hacking, benchmaxxing & RL is out! 1. Closed vs open models 2. Throughput maxxing but accuracy minimizing 3. Benchmaxxing & cheating 4. Distillation & RL 5. Stopping reward hacking 6. @UnslothAI Dynamic Quants Details: 1. If

Jul 21, 2026 Β· β™₯ 394 Β· ⇄ 67

Founder at Unsloth AIYC S24

Intro paths

YC

Daniel went through Y Combinator (Summer 2024) β€” any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Nicolas Dessaigne, General Partner at Y Combinator β€” the partner who ran Unsloth AI's batch and knows the company first-hand. YC profile β†—

β†’

In turn, Daniel can intro founders to Unsloth AI's investors below.

Unsloth AI's investors Β· 2

Samsung NextY Combinator

Co-founders at Unsloth AI

MHMichael Han
Michael HanFounder

Experience

  1. Unsloth AICo-Foundercurrent2023 β€” presentSan Francisco Bay Area
  2. NVIDIAMachine Learning Engineer2018 β€” 2020Sydney, Australia
  3. UNSW Business SchoolGraduate Research And Teaching Assistant2017 β€” 2018Sydney
  4. TelstraResearch Project Lead2017Greater Sydney Area
  5. WestfieldEngineering Project Lead2017Greater Sydney Area

Education

  1. UNSWBachelor of Data Science, Algorithms & AI2017 β€” 2019
  2. UNSWBachelor of Laws and Actuarial Studies2016 β€” 2017

Skills & more

Python54R6C6MATLAB5SAS6Tableau6Julia5Machine Learning99Deep Learning85Economics10Software Development9Computer Science5
+12 moreArtificial IntelligenceAlgorithmsWeb DevelopmentMathematical ModelingOptimizationResearchData ProcessingNatural Language ProcessingAnalytical ModellingStochastic ModelingData ScienceTeamwork

From Daniel's professional profile.

Founder mafias

Y Combinator mafia8,668

Also came through, then founded or led a company.

Sam AltmanPresidentFounded LooptFred EhrsamYC Summer 2012Founded CoinbaseMatt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded PursuitDelian AsparouhovYC Summer 2014Founded Nightingale +1Justin KanYC Winter 2018Founded Rye +3

+ 8,661 more

UNSW mafia29

Also came through, then founded or led a company.

Pasha RayanBachelor of Commerce (PhilosophyFounded A1Zap by A1Base +1Adam GoulburnBachelor of Commerce / Bachelor of ScienceFounded KallyopeLeo LiangPh.D DropoutFounded CipherOwlNiki ScevakBScFounded O3Mudith JayasekaraBachelor of Medical Studies - BMed (with Dist.)Founded ParsedErnest SemerdaMastersFounded Veryfi, Inc.

+ 22 more

Same school

Also attended UNSW221

Jeremy PhilipsInvestor at Spark CapitalSimon CantInvestor at Reinventure GroupDanny GilliganInvestor at Reinventure GroupLeah MitchellChief of Staff at Differential VenturesGrant AllenFounding GP, Schneider Electric Ventures at Giant Ventures Global LlpPurnesh SeegopaulAdvisor at Pangaea Ventures Us Inc.

+ 215 more

Shared employers

Also worked at Unsloth AI6

Mark KimInvestor at Samsung NextGuru ChahalPartner at Lightspeed Venture PartnersPriyanka MitraPartner at M12 (Microsoft's Venture Fund)Hemant MohapatraPartner at Lightspeed India PartnersJames AlcornPartner at Zetta Venture PartnersMichael HanFounder at Unsloth AI

Also worked at NVIDIA104

Diana HuGeneral Partner at Y CombinatorIan ShannonFinance/Legal/IR at 8VCRay SchuderSr. Investment Director at Samsung Catalyst FundSandy YuanAdvisor, AV & Robotics at Verissimo VenturesAbhi DinkarAdvisor - Enterprise Technology at Augment VenturesJon BaradPartner, Investments at Capital One Ventures

+ 98 more

Also worked at UNSW Business School10

Ananya SinhaPrincipal at ArtesianSally YuPrincipal at King River CapitalSabrina ZengCorp Dev't Manager at Aura GroupChristopher ChanSenior Investment Analyst at Aura GroupNicholas OoiInvestment Associate at Investible Climate Tech FundJames RusconiInvestment Associate at Tidal Ventures

+ 4 more

Also worked at Telstra26

Matthew KoertgeManaging Director at Titanium VenturesSteve SchmidtGeneral Partner at Titanium VenturesPhil MorlePartner at Main Sequence VenturesSol TrujilloManaging Partner at L'ATTITUDE VenturesLorenzo ManesHead of Operations at Rialto VenturesCallan SchebellaProduct at Tidal Ventures

+ 20 more