Inbound MMS support for Voice AI Agents

Telnyx AI Agents can now receive inbound MMS messages from users during an active voice call. This means callers can send images or rich media while speaking with the agent, and it can respond in real-time, provided it’s powered by a vision-capable LLM. Currently supported vision models include Groq/llama-4-maverick-17b-128e-instruct and OpenAI/gpt-4o.

What’s new

• In-call MMS support is now available for Voice AI Agents with messaging enabled and matching voice and SMS numbers.
• This functionality works seamlessly with third-party vision models that can interpret image input along spoken dialogue.

Why it matters

This release introduces a major leap in multimodal AI conversations. With MMS support:

• Callers can send a photo, file, or receipt mid-call, and the AI Agent can immediately interpret and respond.
• Agents can deliver more contextual help, like confirming an ID photo or reviewing an image of a damaged product.
• You can offer a richer, more humanlike customer experience without breaking the flow across channels.

Getting started