Guys do you have any suggestion on what model of AI to use for VAPI ? I'm actually using GPT 4o Cluster, but it's 0,08$ so a bit expensive for me as I call about 150 min a day with, so I was thinking about GPT 4.1 Mini, which seems to be a good alternative as it's supposed to be a good AI too ? Cause I have like 2500 words prompt, and 3 tools connected + A knowledge base, so I want to know your advice if GPT 4.1 Mini can handle it ?