​

Models

The Models page centralizes all AI models used by your agents across three tabs: LLM (language models), TTS (text-to-speech voices), and STT (speech-to-text providers).

​

LLM Tab

​

Built-in Models

Callem provides pre-configured LLM providers with multiple model options. These are available to all agents by default.

​

Custom Models (Bring Your Own Model)

Connect any OpenAI-compatible LLM endpoint to use your own models. This works with any provider exposing the standard chat completions API.

​

Adding a Custom Model

1. Navigate to Build > Models > LLM
2. Click Add Custom Model
3. Fill in the form:

4. Click Test Connection to verify the endpoint responds
5. Click Add Model

Once added, the custom model appears in the LLM provider dropdown when configuring agents.

​

Managing Custom Models

Use the action menu (three dots) on each custom model to:

• Test Connection — verify the endpoint is still reachable
• Edit — update name, URL, or API key
• Duplicate — create a copy with “(copy)” suffix
• Delete — remove the model (agents using it will need reconfiguration)

​

TTS Tab — Voice Library

​

Built-in Voices

Browse all available TTS voices across providers. For each voice:

• Preview — click the play button to hear a sample
• Filter — by provider, gender (male/female), or search by name

​

Voice Cloning

Create custom voices from audio samples.

​

Cloning a Voice

1. Click Clone Voice
2. Fill in the form:

3. Click Upload & Clone

Cloned voices appear in the “My Voices” section and are also available in the agent Voice Browser when selecting a TTS voice.

​

My Voices Filter

When you have cloned voices, a My Voices filter appears in both the Models page and the agent Voice Browser, letting you quickly find your custom voices.

​

STT Tab — Speech-to-Text

Browse available STT providers and their supported languages. Each provider card shows:

• Provider name
• Number of supported languages
• Expandable language list with flag, label, and code