Bengaluru-based startup Vahan uses OpenAI's GPT-4o and GPT-4o-mini models in its "AI recruiter" which helps India’s informal workers find jobs via phone calls. The voice-based chatbot supports over 40,000 monthly placements, partnering with 1,500 recruitment agencies across 900 cities. It automates hiring tasks for platforms like Swiggy and Zomato and aims to boost recruitment efficiency.