Indian benchmark indices Sensex and Nifty are likely to open lower on Tuesday, with GIFT Nifty falling over 100 points, signalling a weak start despite a sharp rally across Asian markets and overnight gains on Wall Street. A rebound in global technology stocks, driven by renewed optimism around artificial intelligence following Anthropic's IPO filing, has lifted global sentiment. However, elevated crude oil prices, geopolitical uncertainty and caution ahead of the US Federal Reserve's policy decision could weigh on Indian equities.