GPT-5, OpenAI's most powerful model, is now integrated into Cursor and has shown remarkable effectiveness in coding tasks according to initial feedback from engineers. The model has impressed users with its ability to handle long-running and complex tasks, such as resolving intricate bugs and optimizing Stripe queries to reduce latency. Engineers have found GPT-5 to be highly steerable, requiring explicit instructions to perform tasks accurately, and it has demonstrated the ability to regenerate code components like protobufs across frontend and backend systems. Despite its default verbose output, users have successfully adjusted the model's behavior to suit their preferences for conciseness and agentic responses. As a launch offer, GPT-5 is accessible to paying users with free credits during the first week of its release.