Asian shares are mixed and U.S. futures have edged lower. Oil prices have gained more than 3%, as worries grow over global oil supplies after Saudi Arabia shuts down a major oil pipeline used to help bypass the Strait of Hormuz.

Artificial intelligence agents being tested by OpenAI were involved in a previously undisclosed cyberattack against RubyGems in May, an incident that is now raising uncomfortable questions about how much control humans really have over increasingly autonomous AI systems.

As an Anthropic resignation and OpenAI agents' hack on Hugging Face capture public attention, some researchers worry the industry is racing too fast to develop powerful AI while safety measures lag.

SoftBank Group Corp. secured an $11.87 billion loan to support its investment in US artificial intelligence firm OpenAI, people familiar with the matter said, up from its earlier target of $10 billion.

OpenAI weighs a voluntary AI safety pause amid breach risks and compute limits, while freezing new ChatGPT Pro signups.

AI researchers are warning that faster AI self-improvement could eventually make advanced systems harder for humans to control.

OpenAI appears to have gazumped Tristan Buckmaster (pictured) and Levent Alpöge, a duo of mathematicians labouring on the task. The firm released a 166-page paper detailing the work, which was done using internal models that are not yet available to the public.

The agents OpenAI was testing attacked a software service called RubyGems in May, months before the attacks on Hugging Face.

Stock index futures fell early Monday, pointing to a lower open as investors weighed developments around the artificial intelligence sector and monitored oil prices following a sharp move higher. Nasdaq 100 futures (US100:IND) dropped -1.