GitHub has announced a new pricing structure for its AI coding assistant, Copilot, introducing 'premium requests' that impose limits on users accessing advanced models. Starting May 5, Copilot Pro users will receive 300 premium requests monthly, while Business and Enterprise tiers get 300 and 1,000 requests, respectively. Users can purchase extra requests or upgrade to the new Copilot Pro+ plan, which provides 1,500 requests for $39 per month. This move reflects rising computing costs associated with more complex AI models, despite Copilot's significant contribution to GitHub's revenue growth.