Exclusive: Anthropic acknowledges testing new AI model representing 'step change' in capabilities, after accidental data leak reveals its existence

AI company Anthropic is testing a previously undisclosed AI model called Mythos that is significantly more capable than ...
CNET

Anthropic's New Claude Opus 4.5 AI Model Is Designed for Coding and Office Work

Jon covers artificial intelligence. He previously led CNET's home energy and utilities category, with a focus on energy-saving advice, thermostats, and heating and cooling. Jon has more than a decade ...
Ars Technica

Anthropic says its new AI model “maintained focus” for 30 hours on multistep tasks

Claude is popular with some software developers thanks to Claude Code, and Anthropic is confident about the latest version of Sonnet’s coding capability: “Claude Sonnet 4.5 is the best coding model in ...
ZDNet

I tested Opus 4.5 to see if it's really 'the best in the world' at coding - and things got weird fast

Opus 4.5 failed half my coding tests, despite bold claims File handling glitches made basic plugin testing nearly impossible Two tests passed, but reliability issues still dominate the story I've got ...
Ars Technica

Anthropic’s Claude Haiku 4.5 matches May’s frontier model at fraction of cost

On Wednesday, Anthropic released Claude Haiku 4.5, a small AI language model that reportedly delivers performance similar to what its frontier model Claude Sonnet 4 achieved five months ago but at one ...