Google-backed artificial intelligence start-up reaches $4bn valuation 

Anthropic said its AI systems are safe because they would not tell users how to build a weapon or use racially biased language

Google has launched its own chatbot called Bard.

Anthropic, an artificial intelligence, or AI,  start-up backed by Google parent Alphabet said it had raised $450m (€418m), in the latest sign of a recovery in the start-up funding space.

It takes the company's valuation to $4bn, with a total $1bn raised in funding to date, according to PitchBook data.