AI companies make powerful tech – but they’re also savvy marketers

Anthropic’s Claude Mythos AI is said to be frighteningly capable, but we shouldn’t get carried away by the hype

AI learns language from skewed sources. That could change how we humans speak – and think

Large language models aren’t trained on real-life conversations. As we encounter their language, it could affect our own

British teenager who killed three girls likely viewed footage of Sydney’s Wakeley stabbing before carrying out attack, report finds

Report finds Axel Rudakubana bypassed X age controls and likely viewed footage of Mar Mari Emmanuel stabbing before carrying out UK attack

Hacker group threatens to release Grand Theft Auto VI data in Rockstar Games attack

The group named ShinyHunters have accessed a third party server and have given the company a deadline of 14 April to enter ransom negotiations

Goldman Sachs chief ‘hyper-aware’ of risks from Anthropic’s Mythos AI

US bank has the Claude model and is working closely with the tech firm to improve cyber protection

Meta creating AI version of Mark Zuckerberg so staff can talk to the boss

Digital clone being trained on his thoughts, tone and mannerisms to help workers feel connected

SYBAU, WYLL and PMO: what do the latest teen text abbreviations actually mean?

Just when parents thought they could decode teenage text speak, a new list comes along that raises more questions than answers

Elon Musk’s X cuts payments to users who post clickbait

Platform says it will reward original creators as it penalises ‘aggregators’ for flooding timelines with ‘stolen posts’

Booking.com warns customers of hack that exposed their data

Undisclosed number of names and contact and reservation details accessed in latest cybercrime attempt

Fifteen bucks a signature: the crisis of money in US politics is growing

The fight over California’s billionaire tax is just the latest symptom of a crisis that has escalated since 2010

Rolls-Royce secures nearly £600m in UK government cash to develop small reactors

Engine-maker CEO hails ‘critical milestone’ for company in race to deliver SMR technology built at Wylfa plant on Anglesey

The Guardian view on AI politics: US datacentre protests are a warning to big tech

Editorial: In both Republican and Democratic states, scepticism and hostility towards an unregulated construction boom is growing

Sir Tony Hoare obituary

Pioneering computer scientist who devised the Quicksort algorithm, ways of verifying programs and guards against hackers

‘It feels as if I’ve made a new best friend’: my experiment with AI journalling

What’s it like to have a diary that talks back to you, offering comments and advice on your hopes, fears and lunch plans? I spent two months finding out

‘Disbelief and disappointment’: how Javier Milei’s bribery scandal may have derailed Argentina’s crypto investment

Just as the industry is set to capitalize on country’s political and economic instability, president accused in $5m scheme