Homegrown artificial intelligence model startup Sarvam is in talks to raise another $250-300 million at a $3 billion valuation, according to people aware of these discussions, doubling it from just four months ago.That will potentially make it the highest valued AI startup in the country. In June, Sarvam had secured more than $300 million at a $1.5 billion valuation.The startup builds Indian-language AI models and applications for government