GPT-5 Now Live in Vapi

The complete GPT-5 family, including GPT-5, GPT-5-Mini, and GPT-5-Nano, as well as the gpt-oss model, is now available for use on Vapi, offering a range of options for voice agents. GPT-5 serves as the default for balanced performance, while GPT-5-Mini and GPT-5-Nano are optimized for speed and cost-effectiveness. The architecture features a dynamic router that switches between fast models for simple tasks and more complex models for intricate reasoning, which is beneficial for voice applications by providing low latency and deep reasoning. This results in agents with fewer hallucinations, improved instruction following, and more natural conversations. This technology is particularly useful for customer support and sales agents, enhancing their ability to handle both straightforward and complex interactions reliably. Vapi emphasizes its commitment to providing the best components while allowing for comparison with other models to best suit individual use cases.