Short answer: by verified achievement, the strongest case is Terence Tao, followed by Grigori Perelman and Edward Witten — the full ranked list of 20 is below. No institution publishes an IQ leaderboard of living people, so this ranking weighs peer-judged work (Fields Medals, Nobel and Abel Prizes, Turing Awards, solved Millennium problems) rather than circulating IQ claims.
The 20 names, ranked
- Terence Tao — Fields Medal 2006; the most broadly productive mathematician working today
- Grigori Perelman — Proved the Poincaré conjecture; declined the Fields Medal and the $1M Millennium Prize
- Edward Witten — Fields Medal 1990 — the only physicist ever to win it; architect of M-theory
- Andrew Wiles — Proved Fermat's Last Theorem after 358 years; Abel Prize 2016
- Roger Penrose — Nobel Prize in Physics 2020 for proving black holes follow from general relativity
- Demis Hassabis — Nobel Prize in Chemistry 2024 for AlphaFold; chess master at 13
- Jennifer Doudna — Nobel Prize in Chemistry 2020 for CRISPR gene editing
- Geoffrey Hinton — Turing Award 2018 and Nobel Prize in Physics 2024 — the foundations of deep learning
- Yoshua Bengio — Turing Award 2018; the most-cited computer scientist alive
- Maryna Viazovska — Fields Medal 2022 for solving sphere packing in 8 and 24 dimensions
- Manjul Bhargava — Fields Medal 2014 for new methods in the geometry of numbers
- David Baker — Nobel Prize in Chemistry 2024 for computational protein design
- Avi Wigderson — Abel Prize 2021 and Turing Award 2023 — theory of computation
- Tim Berners-Lee — Invented the World Wide Web; Turing Award 2016
- Shafi Goldwasser — Turing Award 2012; co-invented zero-knowledge proofs
- Barbara Liskov — Turing Award 2008; the Liskov substitution principle
- Judea Pearl — Turing Award 2011; built the mathematics of causal inference
- Katalin Karikó — Nobel Prize in Medicine 2023 for the mRNA chemistry behind the COVID vaccines
- Magnus Carlsen — Highest chess rating in history (2882); world champion 2013–2023
- Marilyn vos Savant — Listed by Guinness for the highest recorded IQ score (1986–1989)
Ranking criterion: weight and independence of peer-judged recognition (Fields, Abel, Nobel, Turing, Millennium Prize problems, world-record performance) and the breadth of the verified contribution. Ties are broken by breadth. IQ scores are not used because for living people they are almost never published, comparable or verifiable.
Searching for the smartest people alive is a reasonable way to look for intellectual inspiration. It becomes misleading when a page turns scattered score claims, estimates and biographies into a single leaderboard. In particular, a list of living people must not include historical figures, and it should never present an unverified score as a fact.
Our approach is deliberately narrower and more useful. We look for enduring, publicly verifiable achievement in a field where expert peers can evaluate it. The people below are examples, not a universal ranking and not an exhaustive list of every brilliant person alive.
Why a “smartest person alive” ranking breaks down
IQ is a standardized score, not a universal unit of human worth or achievement. The American Psychological Association describes IQ as a score based on psychological tests; modern scores are deviations from a particular test’s norm group. Test editions, norms, conditions and the parts of cognition measured all matter. A number quoted without the test, date, norm and qualified administration is not enough to compare people responsibly.
There is also no shared contest in which every living mathematician, scientist, artist, engineer, entrepreneur and strategist takes the same assessment. Even where a valid score exists, it does not tell us who has made the strongest contribution to number theory, protein science, software design, music or public problem-solving.
That is why this page does not use estimated IQs, viral “record” claims, childhood anecdotes or anonymous lists to crown a winner. It also does not use categories such as nationality, race or gender as proxies for intellectual ability.
Exceptional minds in mathematics and theoretical computing
Mathematical achievement provides unusually clear public evidence: difficult work is scrutinized by specialists, and major prizes publish citations explaining why the work matters. The International Mathematical Union’s Fields Medal record and the Abel Prize’s citations are useful starting points.
Terence Tao
A 2006 Fields Medalist whose work spans harmonic analysis, partial differential equations, additive combinatorics and more. He is a strong example of why sustained mathematical contribution says more than a circulating IQ claim.
Maryna Viazovska
Recipient of the 2022 Fields Medal. Her work on the sphere-packing problem in eight dimensions is a landmark result, evaluated through proof and expert review rather than a generalized intelligence score.
Manjul Bhargava
Recipient of the 2014 Fields Medal for work in number theory. His research illustrates a different kind of intellectual excellence: deep structural insight built over years of scholarship.
Edward Witten
A Fields Medalist whose work has shaped mathematical physics. The point is not to compare his mind numerically with anyone else’s, but to recognize a record of field-defining ideas.
Andrew Wiles
The 2016 Abel Prize recognized his proof of Fermat’s Last Theorem through the modularity conjecture for semistable elliptic curves—an achievement with an explicit, published prize citation.
Avi Wigderson
Co-recipient of the 2021 Abel Prize for foundational contributions to theoretical computer science and discrete mathematics. This is a useful reminder that profound intellectual work crosses the boundary between mathematics and computing.
Science, medicine and AI
Discovery is collaborative, but individual researchers can still make clearly documented, field-changing contributions. Nobel Prize citations are not IQ tests; they are evidence of work judged important by a relevant scientific institution.
Geoffrey Hinton
The 2024 Nobel Prize in Physics recognized foundational discoveries and inventions enabling machine learning with artificial neural networks. His career shows how a technical idea can reshape an entire discipline.
Demis Hassabis
One of the 2024 Nobel Prize in Chemistry laureates recognized for protein-structure prediction. It is an example of high-impact work at the intersection of AI, biology and scientific tools.
David Baker
The 2024 Nobel Prize in Chemistry recognized his work in computational protein design. This work demonstrates that sophisticated scientific reasoning includes building methods that let others explore new possibilities.
Magnus Carlsen
Elite chess is a specialized performance domain, not a measure of all-purpose intelligence. It is still a vivid example of disciplined calculation, pattern recognition, preparation and decision-making under pressure.
Computing and the web
Computer science has its own public record of achievement. The ACM A.M. Turing Award recognizes fundamental contributions to computing; it is a much stronger source for a reader than a claim that a person has an extraordinary IQ.
Tim Berners-Lee
The 2016 Turing Award recognized the conceptualization and implementation of the World Wide Web. Its influence is visible in the system readers use to reach this page.
Barbara Liskov
The 2008 Turing Award recognized foundational contributions to programming languages and systems design. Her work is a useful example of intellectual impact expressed through durable technical abstractions.
Shafi Goldwasser
A 2012 Turing Award recipient whose work helped establish modern foundations for cryptography and complexity theory. It shows how theoretical insight can later underpin practical digital security.
Marilyn vos Savant
She is often included in “highest IQ” searches. Her presence in popular discussion is a good reason to separate a reported test result from a claim to be the single smartest person alive.
Six more names on the list
Added in the September 2026 review: the proof, prize or record that puts each of them among the twenty.
Terence Tao
A 2006 Fields Medalist whose output spans harmonic analysis, partial differential equations, additive combinatorics and prime-number theory — more than 300 papers with over 100 co-authors. No living mathematician works across so many fields at the frontier.
Grigori Perelman
Between 2002 and 2003 Perelman posted three preprints that proved the Poincaré conjecture, the only Millennium Prize problem solved to date. He declined the 2006 Fields Medal and the 2010 Millennium Prize, and lives in seclusion in St Petersburg.
Roger Penrose
Penrose's 1965 singularity theorem showed that black holes are an unavoidable consequence of general relativity — work recognised with the 2020 Nobel Prize in Physics. Twistor theory, Penrose tilings and his books on consciousness extend a career now in its seventh decade.
Jennifer Doudna
With Emmanuelle Charpentier, Doudna turned a bacterial immune mechanism into CRISPR-Cas9, the programmable gene-editing tool that now underpins approved therapies. The 2020 Nobel Prize in Chemistry followed within eight years of the 2012 paper.
Yoshua Bengio
Bengio shared the 2018 Turing Award for the deep-learning revolution and is, by citation count, the most-cited computer scientist in the world. His work on attention mechanisms and representation learning sits underneath every modern language model.
Judea Pearl
Pearl's Bayesian networks and, later, his calculus of causation gave machines and scientists a formal language for cause and effect. The 2011 Turing Award citation credits him with transforming artificial intelligence and statistics alike.
Katalin Karikó
For decades Karikó pursued modified-nucleoside mRNA while grants were refused and her position downgraded. The chemistry she and Drew Weissman published in 2005 became the basis of the mRNA vaccines and earned the 2023 Nobel Prize in Physiology or Medicine.
How this guide is built—and how it will be maintained
Editorial standard
- Living people only. Historical figures belong in history guides, never in a list of people alive today.
- Verifiable evidence first. We prioritize a primary award citation, professional institution or directly attributable body of work.
- No invented score comparison. We do not convert IQ claims from different tests into a single ranking or use estimates as measured results.
- Field context matters. An achievement in pure mathematics, experimental science, software design or chess solves a different kind of problem. The groups above are not ordered from “most” to “least” intelligent.
- Correctable and reviewable. If a source is wrong, an entry is outdated, or a deserving contributor is missing, we can update the guide with a cited correction.
This policy is stricter than a viral leaderboard, but it is also more useful to readers and more durable in search. It gives a reader a way to follow the evidence, explore a field and understand why a person is included.
What this page deliberately does not claim
- That IQ scores from unrelated tests, eras or news reports can be ranked as though they were one scientific dataset.
- That prize winners are the only brilliant people alive, or that a prize measures every important form of intelligence.
- That success, education, wealth, fame or a child-prodigy story is a substitute for careful evidence.
- That a current public list can settle an unanswerable question once and for all.
Primary sources and further reading
- American Psychological Association Dictionary: IQ — definition and interpretation context for IQ scores.
- International Mathematical Union: Fields Medal — chronological record of Fields Medalists.
- The Abel Prize: Sir Andrew J. Wiles (2016) — official award citation.
- The Abel Prize 2021 citation — official citation for László Lovász and Avi Wigderson.
- Nobel Prize: Geoffrey Hinton, 2024 — official award facts and motivation.
- Nobel Prize Banquet programme 2024 — official record of the 2024 Nobel laureates.
- ACM awards booklet — historical list of Turing Award recipients.
Frequently asked questions
Who is the smartest person alive today?
By verified achievement, Terence Tao has the strongest case: a Fields Medal, a Breakthrough Prize and frontier results across more sub-fields of mathematics than anyone alive. No IQ test has been published for him or for most people on this list, which is why the ranking above weighs peer-judged work rather than a score.
What is the highest IQ ever recorded?
Be careful with this question. Public claims often omit the test, date, norm group, standard deviation and testing conditions. A score can be meaningful in a qualified assessment, but it is not a reliable way to produce a worldwide all-time leaderboard.
How is this list ranked?
By the weight and independence of peer-judged recognition — Fields Medals, Abel and Nobel Prizes, Turing Awards, solved Millennium Prize problems and world-record performance — then by the breadth of the verified contribution. IQ scores are not used: for living people they are almost never published or comparable.
Why do famous historical geniuses not appear here?
This page answers “alive today.” Historical figures are important, but including them would make the premise false and would mix documented work with impossible retrospective IQ estimates.
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Browse biographies, ideas and achievements across mathematics, science, computing, art and history.
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