What company is leading in nuclear fusion?
Asked "What company is leading in nuclear fusion?", Gemini, Google AI Mode and Perplexity named 11 distinct names across 14 answers on September 8, 2026, and 8 of them in two or more answers.
Measured acrossGeminiGoogle AI ModePerplexity
8 of 11 names confirmed · named in 2 or more of 14 answers · asked September 8, 2026 · 3 engines
Commonwealth Fusion Systems (CFS) is widely regarded as the leader in nuclear fusion, with significant funding and progress on the SPARC tokamak. Helion Energy and TAE Technologies are also top contenders, each pursuing different fusion approaches and commercialization timelines.
- 1Commonwealth Fusion Systems (CFS)named in 14 of 14 answers
'%3e%3c/path%3e%3cpath%20d='M20.616%2010.835a14.147%2014.147%200%2001-4.45-3.001%2014.111%2014.111%200%2001-3.678-6.452.503.503%200%2000-.975%200%2014.134%2014.134%200%2001-3.679%206.452%2014.155%2014.155%200%2001-4.45%203.001c-.65.28-1.318.505-2.002.678a.502.502%200%20000%20.975c.684.172%201.35.397%202.002.677a14.147%2014.147%200%20014.45%203.001%2014.112%2014.112%200%20013.679%206.453.502.502%200%2000.975%200c.172-.685.397-1.351.677-2.003a14.145%2014.145%200%20013.001-4.45%2014.113%2014.113%200%20016.453-3.678.503.503%200%20000-.975%2013.245%2013.245%200%2001-2.003-.678z'%20fill='url(%23lobe-icons-gemini-1-_R_0_)'%3e%3c/path%3e%3cpath%20d='M20.616%2010.835a14.147%2014.147%200%2001-4.45-3.001%2014.111%2014.111%200%2001-3.678-6.452.503.503%200%2000-.975%200%2014.134%2014.134%200%2001-3.679%206.452%2014.155%2014.155%200%2001-4.45%203.001c-.65.28-1.318.505-2.002.678a.502.502%200%20000%20.975c.684.172%201.35.397%202.002.677a14.147%2014.147%200%20014.45%203.001%2014.112%2014.112%200%20013.679%206.453.502.502%200%2000.975%200c.172-.685.397-1.351.677-2.003a14.145%2014.145%200%20013.001-4.45%2014.113%2014.113%200%20016.453-3.678.503.503%200%20000-.975%2013.245%2013.245%200%2001-2.003-.678z'%20fill='url(%23lobe-icons-gemini-2-_R_0_)'%3e%3c/path%3e%3cdefs%3e%3clinearGradient%20gradientUnits='userSpaceOnUse'%20id='lobe-icons-gemini-0-_R_0_'%20x1='7'%20x2='11'%20y1='15.5'%20y2='12'%3e%3cstop%20stop-color='%2308B962'%3e%3c/stop%3e%3cstop%20offset='1'%20stop-color='%2308B962'%20stop-opacity='0'%3e%3c/stop%3e%3c/linearGradient%3e%3clinearGradient%20gradientUnits='userSpaceOnUse'%20id='lobe-icons-gemini-1-_R_0_'%20x1='8'%20x2='11.5'%20y1='5.5'%20y2='11'%3e%3cstop%20stop-color='%23F94543'%3e%3c/stop%3e%3cstop%20offset='1'%20stop-color='%23F94543'%20stop-opacity='0'%3e%3c/stop%3e%3c/linearGradient%3e%3clinearGradient%20gradientUnits='userSpaceOnUse'%20id='lobe-icons-gemini-2-_R_0_'%20x1='3.5'%20x2='17.5'%20y1='13.5'%20y2='12'%3e%3cstop%20stop-color='%23FABC12'%3e%3c/stop%3e%3cstop%20offset='.46'%20stop-color='%23FABC12'%20stop-opacity='0'%3e%3c/stop%3e%3c/linearGradient%3e%3c/defs%3e%3c/svg%3e)
'%20transform='translate(0%201)'%3e%3c/path%3e%3cpath%20d='M6.726%2020.16A2.528%202.528%200%20009.152%2022h1.566c1.37%200%202.49-1.1%202.525-2.48l.17-6.69-.357%201.228a2.528%202.528%200%2001-2.423%201.83h-4.32l-1.54-.842-1.667.843h.497c1.124%200%202.113.75%202.426%201.84l.697%202.432z'%20fill='url(%23lobe-icons-copilot-1-_R_0_)'%20transform='translate(0%201)'%3e%3c/path%3e%3cpath%20d='M15%200H6.252c-2.5%200-4%203.331-5%206.662-1.184%203.947-2.734%209.225%201.75%209.225H6.78c1.13%200%202.12-.753%202.43-1.847.657-2.317%201.809-6.359%202.713-9.436.46-1.563.842-2.906%201.43-3.742A1.97%201.97%200%200115%200'%20fill='url(%23lobe-icons-copilot-2-_R_0_)'%20transform='translate(0%201)'%3e%3c/path%3e%3cpath%20d='M15%200H6.252c-2.5%200-4%203.331-5%206.662-1.184%203.947-2.734%209.225%201.75%209.225H6.78c1.13%200%202.12-.753%202.43-1.847.657-2.317%201.809-6.359%202.713-9.436.46-1.563.842-2.906%201.43-3.742A1.97%201.97%200%200115%200'%20fill='url(%23lobe-icons-copilot-3-_R_0_)'%20transform='translate(0%201)'%3e%3c/path%3e%3cpath%20d='M9%2022h8.749c2.5%200%204-3.332%205-6.663%201.184-3.948%202.734-9.227-1.75-9.227H17.22c-1.129%200-2.12.754-2.43%201.848a1149.2%201149.2%200%2001-2.713%209.437c-.46%201.564-.842%202.907-1.43%203.743A1.97%201.97%200%20019%2022'%20fill='url(%23lobe-icons-copilot-4-_R_0_)'%20transform='translate(0%201)'%3e%3c/path%3e%3cpath%20d='M9%2022h8.749c2.5%200%204-3.332%205-6.663%201.184-3.948%202.734-9.227-1.75-9.227H17.22c-1.129%200-2.12.754-2.43%201.848a1149.2%201149.2%200%2001-2.713%209.437c-.46%201.564-.842%202.907-1.43%203.743A1.97%201.97%200%20019%2022'%20fill='url(%23lobe-icons-copilot-5-_R_0_)'%20transform='translate(0%201)'%3e%3c/path%3e%3cdefs%3e%3cradialGradient%20cx='85.44%25'%20cy='100.653%25'%20fx='85.44%25'%20fy='100.653%25'%20gradientTransform='scale(-.8553%20-1)%20rotate(50.927%202.041%20-1.946)'%20id='lobe-icons-copilot-0-_R_0_'%20r='105.116%25'%3e%3cstop%20offset='9.6%25'%20stop-color='%2300AEFF'%3e%3c/stop%3e%3cstop%20offset='77.3%25'%20stop-color='%232253CE'%3e%3c/stop%3e%3cstop%20offset='100%25'%20stop-color='%230736C4'%3e%3c/stop%3e%3c/radialGradient%3e%3cradialGradient%20cx='18.143%25'%20cy='32.928%25'%20fx='18.143%25'%20fy='32.928%25'%20gradientTransform='scale(.8897%201)%20rotate(52.069%20.193%20.352)'%20id='lobe-icons-copilot-1-_R_0_'%20r='95.612%25'%3e%3cstop%20offset='0%25'%20stop-color='%23FFB657'%3e%3c/stop%3e%3cstop%20offset='63.4%25'%20stop-color='%23FF5F3D'%3e%3c/stop%3e%3cstop%20offset='92.3%25'%20stop-color='%23C02B3C'%3e%3c/stop%3e%3c/radialGradient%3e%3cradialGradient%20cx='82.987%25'%20cy='-9.792%25'%20fx='82.987%25'%20fy='-9.792%25'%20gradientTransform='scale(-1%20-.9441)%20rotate(-70.872%20.142%201.17)'%20id='lobe-icons-copilot-4-_R_0_'%20r='140.622%25'%3e%3cstop%20offset='6.6%25'%20stop-color='%238C48FF'%3e%3c/stop%3e%3cstop%20offset='50%25'%20stop-color='%23F2598A'%3e%3c/stop%3e%3cstop%20offset='89.6%25'%20stop-color='%23FFB152'%3e%3c/stop%3e%3c/radialGradient%3e%3clinearGradient%20id='lobe-icons-copilot-2-_R_0_'%20x1='39.465%25'%20x2='46.884%25'%20y1='12.117%25'%20y2='103.774%25'%3e%3cstop%20offset='15.6%25'%20stop-color='%230D91E1'%3e%3c/stop%3e%3cstop%20offset='48.7%25'%20stop-color='%2352B471'%3e%3c/stop%3e%3cstop%20offset='65.2%25'%20stop-color='%2398BD42'%3e%3c/stop%3e%3cstop%20offset='93.7%25'%20stop-color='%23FFC800'%3e%3c/stop%3e%3c/linearGradient%3e%3clinearGradient%20id='lobe-icons-copilot-3-_R_0_'%20x1='45.949%25'%20x2='50%25'%20y1='0%25'%20y2='100%25'%3e%3cstop%20offset='0%25'%20stop-color='%233DCBFF'%3e%3c/stop%3e%3cstop%20offset='24.7%25'%20stop-color='%230588F7'%20stop-opacity='0'%3e%3c/stop%3e%3c/linearGradient%3e%3clinearGradient%20id='lobe-icons-copilot-5-_R_0_'%20x1='83.507%25'%20x2='83.453%25'%20y1='-6.106%25'%20y2='21.131%25'%3e%3cstop%20offset='5.8%25'%20stop-color='%23F8ADFA'%3e%3c/stop%3e%3cstop%20offset='70.8%25'%20stop-color='%23A86EDD'%20stop-opacity='0'%3e%3c/stop%3e%3c/linearGradient%3e%3c/defs%3e%3c/svg%3e)
- 2Helion Energynamed in 13 of 14 answers
- 3TAE Technologiesnamed in 13 of 14 answers
- 4Proxima Fusionnamed in 6 of 14 answers
- 5General Fusionnamed in 3 of 14 answers
- 6Zap Energynamed in 3 of 14 answers
- 7Tokamak Energynamed in 2 of 14 answers
- 8Type One Energynamed in 2 of 14 answers
- 9Pacific Fusionnamed in 1 of 14 answersone answer
- 10ITERnamed in 1 of 14 answersone answer
- 11First Light Fusionnamed in 1 of 14 answersone answer
LOCKED
The full measurement
- The position each of the 3 engines gave all 11 names.
- How many of the 14 answers named each of them.
- 6 sampled observations behind this ranking, and where the engines disagree.
- Fan-out — the query each engine actually searched.
- Every citation, and the sources nobody cited.