May 22 (Reuters) -

Artificial intelligence lab Anthropic on Thursday unveiled

its latest top-of-the-line technology, Claude Opus 4, which it

says can write computer code autonomously for hours at a time.

The startup, backed by Google and Amazon.com ( AMZN )

, has distinguished its work in part by building AI that

excels at coding. It also announced the AI model Claude Sonnet

4, Opus's smaller and more cost-effective cousin.