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Artificial intelligence outperforms the world’s top 30 mathematicians at a test in California

This May, thirty leading mathematicians from around the world gathered in Berkeley, California, to compete in math skills with the o4-mini chatbot from OpenAI.
For two days, mathematicians forced the chatbot based on the Big Language Model to solve complex math problems and were stunned by the result. o4-mini gave answers and solutions to complex math problems, demonstrating almost a professorial level.
«I have colleagues who have literally said that these models are close to mathematical genius», — said the meeting leader, a mathematician from the University of Virginia Ken Ono.
Models such as the o4-mini are lighter and more flexible than previous models. They are trained to predict the following result in sequence. o4-mini was trained on specialized datasets with strong reinforcement from experts.
To evaluate the effectiveness of o4-mini, OpenAI first turned to the nonprofit organization Epoch AI, which created 300 math problems for the LLM benchmarking. Traditional AI models were able to answer only 2% of the tasks correctly. However, OpenAI’s model significantly outperformed.
Epoch AI hired Elliot Glaser, who recently received his PhD in mathematics, to participate in a new FrontierMath benchmark collaboration in September 2024. The project included a large number of questions of various difficulty levels. In particular, the first three covered bachelor’s, master’s, and research level tasks. In April 2025, Glaser found that o4-mini was only able to solve 20% of the tasks.
After that, the analyst decided to check how The LLM will cope with the fourth level of tasks intended for academics. Only a small group of people in the world would be able to develop such questions, let alone answer them. The mathematicians who participated had to sign a non-disclosure agreement requiring them to communicate exclusively through the Signal messaging program.
Every problem that o4-mini failed to solve guaranteed a mathematician a $7.5k prize. During the decisive meetings, 30 leading mathematicians were divided into groups of 6 For two days, the scientists competed with each other, coming up with tasks that they could solve but that would stump the OpenAI AI model.
As he says Ken Ono, he came up with a problem on the level of a good doctoral dissertation on a number theory question. Over the next 10 minutes, he watched o4-mini unfold the solution and demonstrate the course of his own reasoning. The chatbot spent the first few minutes studying the literature on the topic. After that, it solved a simpler problem as a training exercise. Five minutes later, o4-mini presented a correct but daring solution to the problem that Ono had come up with.
«I was not ready for such a confrontation with LLM I have never seen such reasoning in a model before. This is exactly what scientists do. It’s scary», — Ken Ono admits.
And although the mathematicians found ten problems that proved to be beyond the o4-mini, they were impressed by the progress of AI over the past year It only took him a few minutes to complete a task that would have taken a human expert weeks or months.
As a result, the mathematicians concluded that artificial intelligence models will probably soon be able to solve the most complex problems that even the world’s leading experts cannot solve. In this case, mathematicians will only have to give AI tasks and wait for an answer.
Source: LiveScience
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US Military Expands AI Investment With $800 Million in Contracts

The Pentagon recently awarded up to $200 million each to four U.S.-based artificial intelligence (AI) companies developing “frontier” models: Anthropic, Google, OpenAI and xAI. The contracts are the latest sign of AI adoption across the U.S. military.
Brand Stories
Credit cards that offer hotel perks: How they work and who should get one

Some cards are co-branded with hotel chains, while others provide broad travel benefits across multiple brands.
Cards with hotel benefits (as compiled by Paisabazaar)
HSBC Taj Credit Card offers 25% savings on Taj hotel stays, room upgrades, dining discounts, free night stays and Taj InnerCircle Platinum membership.
Marriott Bonvoy HDFC Credit Card provides Marriott Bonvoy Silver Elite status, free night awards based on spending milestones, and Marriott Bonvoy Points on hotel and travel spends.
American Express Platinum Charge Card includes memberships with loyalty programmes such as Marriott Bonvoy Gold Elite, Hilton Honors Gold Elite, Taj Epicure Plus and others. Cardholders get room upgrades, complimentary breakfasts, and special rates at luxury hotels including Oberoi and Lalit.
Axis Bank Reserve Credit Card offers memberships like ITC Culinaire, Accor Plus and Club Marriott. Benefits include free night stays, dining discounts, room upgrades, and exclusive offers at partner hotels.
HDFC Infinia Credit Card (Metal Edition) provides Club Marriott membership, discounts and offers at ITC Hotels, and higher reward points on travel bookings through SmartBuy.
ALSO READ | How luxury hotels in India are evolving insurance practices with modern needs
ICICI Emeralde Private Metal Credit Card gives Taj Epicure membership, reward points on hotel bookings via iShop, and options to redeem points for hotel vouchers.
Axis Atlas Credit Card allows cardholders to earn EDGE Miles that can be converted into hotel loyalty points with partners like Accor, Wyndham, ITC and Marriott.
Hotels say these co-branded card tie-ups help build guest loyalty.
KB Kachru, Chairman, South Asia, Radisson Hotel Group, says, “Co-branded credit card partnerships are a powerful lever in enhancing guest loyalty and encouraging repeat stays. These collaborations extend the reach of our loyalty program beyond the hotel stay, allowing members to earn points on everyday purchases—making engagement with the brand more frequent and meaningful.”
He adds that Radisson has partnered with American Express and is exploring more local tie-ups to expand its base in India.
Arjun Baljee, Founder of Iconiqa and President of Royal Orchid Hotels, says, “Co-branded card partnerships help hotels remain top of wallet by allowing guests to earn points not only during stays but also through everyday spends, strengthening their transactional connection with the brand.”
Both hotel groups note that guests are redeeming more points and free night vouchers than before.
According to Kachru, redemption rates have increased, especially for leisure trips and festive stays. Baljee says guests often use points and vouchers on weekends and staycations.
Such premium hotel credit cards are generally used by frequent travellers and high spenders who stay at partner hotels and spend enough to benefit from loyalty rewards. Whether to use one depends on how often a person travels, their spending habits and if they can make full use of the perks relative to the annual fee, experts say.
ALSO READ | From points to perks: What hotel loyalty programmes are and who should join
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Kakao, Naver step up global AI hunt amid fierce tech race

South Korea’s internet pioneers, Kakao Corp. and Naver Corp., are ramping up overseas investments in artificial intelligence startups, shifting focus to North America in a move that is raising concerns among domestic startups over tighter funding at home.
After a two-year lull, both companies have resumed active startup investing but with a markedly global tilt.
The pair, which respectively backed about 20 startups annually during 2021–2022, have since cut that pace by more than half, according to Seoul-based tracker The VC.
Now, their investments are skewed toward US-based companies developing next-generation AI technologies in hopes of tapping innovations that align with their core platforms or open up new growth paths.
AI IS A MUST FOR ANOTHER LEAP
According to the investment banking industry on Tuesday, Naver Cloud Corp., a cloud computing arm of Naver, recently led a Series A funding round for Urban Datalab, the developer of an AI medical platform, MeDiAuto, with its own investment of 3.5 billion won ($2.5 million).
Naver’s newly launched Naver Ventures also made its debut investment in TwelveLabs, a Silicon Valley-based startup with an unrivaled multimodal AI technology that has already attracted big-name backers, including Nvidia, Samsung Electronics Co. and Intel Corp.
“We are open to collaboration (between Naver and TwelveLabs) next year or later,” said Kim Sung-ho, head of Naver’s Immersive Media Platform team.
Naver’s renewed push into AI investing has gained further momentum since its founder Lee Hae-jin returned as chairman earlier this year.
“If David wants to beat Goliath, he must aim well with the right stone,” said Lee at a ceremony celebrating the opening of Naver Ventures, the company’s first dedicated overseas venture capital in Silicon Valley, last month. “We are in the middle of picking the right stone.”
In this analogy, Naver is the underdog battling US tech giants in the AI race.
Naver’s in-house corporate venturing (CV) team, D2SF, has also made a series of AI-focused investments this year.
It has invested in AI-powered logistics platform startup Techtaka; AI game developer Anchor Node; AI-supported autonomous driving technology developer whereable.ai; and multi-modal commerce AI startup Studio Lab.
Kakao has been similarly active in investing in AI companies.
According to The VC, Kakao Investment Co., Kakao’s venture investment arm, has recently invested 3 billion won in Seoul-based AI chip startup FurisosaAI Inc.
Its another venture capital company, Kakao Ventures Corp. has joined early-stage funding rounds of AI agent developer Tzafon and large language model startup Trillion Labs.
NORTH AMERICA EMERGES AS A NEW BATTLEGROUND
While the uptick in tech investment is a welcome shift after years of slowdown, Korean startups now worry they may be left behind.
Historically reliant on Kakao and Naver for early-stage capital, domestic startups fear the funding tide may be turning westward – just as global AI interest is surging.
Of five startups Naver D2SF has invested in 2024, three are US-based, including 3D content developer Claythis and YesPlz AI, a fashion-focused multimodal AI developer.
Kakao Ventures has also invested in FS2, a 3D AI chip design company led by MIT engineers; Oligo Space, an automated spacecraft design and production toolchain developer; and medTech startup Kompass Diagnostics.
To deepen its reach in the North American venture capital ecosystem, Naver opened D2SF’s US office in Silicon Valley last year and launched Naver Ventures in the global tech hub to scout growth-stage firms.
Kakao Ventures’ officials regularly visit the US once every two to three months to build ties with local VCs, engineers and researchers.
Investors see more room for upside in US startups than in their Korean counterparts, offering greater synergy.
“The ecosystem for tech-based startups is more mature in the US, and top US universities generate stronger pipelines of investable early-stage companies,” said an official from a Korean VC company.
The trend also reflects a strategic calculus, said industry observers.
Korean tech giants face less public scrutiny abroad compared to frequent domestic criticism over big tech firms’ aggressive M&A moves with startups after investment.
That’s prompting concern that capital could increasingly flow to overseas startups instead of bolstering the local tech scene.
“Startup funding is borderless,” said an official in the VC industry. “Without competitiveness to appeal globally, any startups won’t survive.”
Write to Eun-Yi Ko at koko@hankyung.com
Sookyung Seo edited this article.
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