> ## Documentation Index
> Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# LLM providers

> See every LLM provider you can use to run a Bolna voice agent, including bringing your own model, and open the setup guide for each.

The LLM decides what the agent says next. Pick it on the agent's **Intelligence** tab, or set it in the `llm_config` block of the agent config. Each provider below has its own guide with models, configuration and troubleshooting.

Not sure which to choose? [Choose providers](/docs/concepts/choosing-providers) compares them by language, latency and cost. To use your own account with a provider, see [Connect provider credentials](/docs/providers).

<CardGroup cols={2}>
  <Card title="OpenAI" href="/docs/openai-llm">
    Configure GPT-5.6, GPT-5.5, GPT-5.4, or GPT-5.4-mini as the LLM for your Bolna voice agent — model selection, streaming config, and function calling.
  </Card>

  <Card title="OpenRouter" href="/docs/openrouter">
    Access models from OpenAI, Anthropic, Google, Mistral, Meta, and more through a single OpenRouter API key.
  </Card>

  <Card title="Azure OpenAI" href="/docs/azure-openai">
    Use GPT-5.4-mini, GPT-5.4, GPT-4.1, or GPT-4o through Azure OpenAI for enterprise data residency and compliance.
  </Card>

  <Card title="DeepSeek" href="/docs/deepseek">
    Reference for configuring DeepSeek models in a Bolna voice agent: V4 Flash and V4 Pro, including JSON config, prompt caching, and migration steps.
  </Card>

  <Card title="Anthropic" href="/docs/anthropic">
    Reference for configuring Anthropic Claude models in a Bolna voice agent: Claude Sonnet 5, Opus 4.8, and Haiku 4.5, with JSON config and model guidance.
  </Card>

  <Card title="Google Gemini" href="/docs/gemini-llm">
    Reference for configuring Google Gemini models in a Bolna voice agent: Gemini 2.5 Flash, Gemini 2.5 Pro, and the Gemini 3.x series, with JSON config.
  </Card>

  <Card title="Bring your own model" href="/docs/custom">
    Point a voice agent at your own self-hosted or third-party OpenAI-compatible model, with your endpoint and your key.
  </Card>
</CardGroup>


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