### Answer I don't have specific documentation about whether a Retell AI agent can search the internet for information in real-time during a call. However, based on my knowledge of Retell AI's architecture, agents can use Tool Calling (Function Calling) to trigger external APIs during conversations. This means you could potentially integrate an external search API or web lookup service as a custom function that the agent can call when needed. For detailed guidance on implementing this capability, I'd recommend: - Visit [) - Visit [Contact Sales]() Would you like me to provide a general answer about how tool calling works in Retell AI to achieve internet lookups?

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### Answer Not necessarily. While Retell AI supports GPT models (including GPT-4.1, GPT-4o, and GPT-5 variants) , the LLMs themselves don't have built-in real-time internet browsing capabilities during a call. [(1) ]() [(2) ]() LLMs are trained on large datasets and can generate responses based on that training, but they don't inherently search the web live. [(3) ]() To enable internet lookups, you'd need to implement a custom function/tool that calls an external search API. The agent can then use Tool Calling to trigger that function when it needs to retrieve information. This is how you'd bridge the gap between the LLM's knowledge and real-time web data. Would you like more details on how tool calling works in Retell AI?

​ To learn more, see the sources I considered: [[1] Retell AI Launches GPT-5 for Voice Agents – Higher Intelligence, Smarter Conversations | Retell AI](https://www.retellai.com/blog/gpt-5-now-on-retell-smarter-ai-voice-agents-with-reasoning-power) [[2] Smarter AI Phone Calls with ChatGPT-4.1 | Retell AI | Retell AI](https://www.retellai.com/blog/chatgpt-4-1-ai-phone-calling-retell) [[3] Large Language Model (LLM)](https://www.retellai.com/glossary/large-language-model-llm) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.