Hello, as we all know, GPT 5 has been pretty bad for vapi, how are the two new 5.1 models? Are they any good? I'm also curious to know if the latency times are correct, 5.1 instant is just as fast as plain 5.1. It also has the exact same specs. Any difference there?

Hi Operations, Regarding the new GPT models, you can now utilize the 'gpt-4.1', 'gpt-4.1-mini', and 'gpt-4.1-nano' models for improved performance. These are available for use with OpenAI models. Additionally, the 'gpt-4.1-2025-04-14', 'gpt-4.1-mini-2025-04-14', and 'gpt-4.1-nano-2025-04-14' models are accessible through Azure OpenAI and can be configured via the API at this time. For more detailed information, please check the [April 15, 2025 changelog](https://docs.vapi.ai/changelog/2025/4/15) and [May 15, 2025 changelog](https://docs.vapi.ai/changelog/2025/5/15).