Time between AI Models???

With the upcoming Grok and Gemini changes, losing Grok meant downgrading my playstyle. So, I decided to create an interview of some sort. Created a test world, but the idea was to ask 3 questions to know their limitations. So, I would pick an AI model, ask 3 questions (the first one being "state your AI model name"). Worked fine for Kimi K2.5, GPT-5, Llama 3.3, Llama 4, then Qwen3-235B. That's where that every AI model chose after that saying it was GPT-4o. Change to Grok, still saying it was GPT4o, even asking 10 minutes later. So the question, is there a "locked" time before you can switch a model?