Eight of fourteen models named CloudTalk first on the direct prompt; zero named Vapi. CloudTalk was named by twelve of the fourteen models and Vapi by fourteen and CloudTalk carries 23 labels and Vapi 52, so the shares are not directly comparable.
Named in nine categories this edition.
Named in one category this edition.
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the AI voice agents page.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | ||||||
| GPT-5.4 mini | ||||||
| Gemini 3.5 Flash | ||||||
| Perplexity Sonar | ||||||
| Grok 4.20 | ||||||
| Mistral Small | ||||||
| DeepSeek V4 Flash | ||||||
| Llama 4 Maverick | ||||||
| Qwen 3.7 Flash | ||||||
| Kimi K2 | ||||||
| GLM 4.7 FlashX | ||||||
| MiniMax M2.5 | ||||||
| GPT-6 Luna | ||||||
| Muse Glimmer 30B |
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.
“Start with CloudTalk if your mid-market B2B focus is on integrated sales/support without deep coding—it's the most "plug-and-play"” Grok 4.20 · direct prompt · first choice
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Multiple AI model reviews flag Vapi with a high negative share (43% negative labels in one analysis).” Mistral Small · negative prompt · hard negative
“Vapi - 43% of labels are negative, and 8 out of 14 models have negative sentiments.” Llama 4 Maverick · negative prompt · hard negative
“Vapi, if you want a turnkey, low-maintenance setup or maximum control over the whole stack. Its docs say recordings, logging, and transcription are enabled by default” GPT-6 Luna · negative prompt · soft negative
“Choose Vapi or Retell AI if you are a developer or team building a scalable, customized phone agent” Gemini 3.5 Flash · comparative prompt · first choice
“Vapi offers the most flexibility—you can swap speech-to-text, LLM, and TTS providers” MiniMax M2.5 · comparative prompt · first choice
“Often cited as having the most flexible infrastructure... Choose Retell AI or Vapi” Qwen 3.7 Flash · comparative prompt · first choice
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.