> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.vapi.ai/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.vapi.ai/_mcp/server.

# Inflection AI

> Connect an Inflection AI API key to Vapi and configure an assistant with a supported Inflection AI model.

Inflection AI is a large language model provider focused on conversational interactions. Connect your own Inflection AI account to use its models on a Vapi assistant.

## What is Inflection AI

Inflection AI builds the Pi family of large language models, designed for conversational interactions.

## Connect Inflection AI

Inflection AI requires your own account. Connect your Inflection AI API key on the [Integrations](/providers/integrations) page before configuring an assistant. Without a connected Inflection AI key, the model below will not work.

## Language model

Set `model.provider` to `inflection-ai` and `model.model` to a supported model.

```bash
curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \
  -H "Authorization: Bearer $VAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": { "provider": "inflection-ai", "model": "inflection_3_pi" }
  }'
```

For additional API configuration options, review the [`InflectionAIModel` fields](/api-reference/assistants/create#request.body.model.InflectionAIModel) in the Create Assistant API reference.

| Model           | Model ID          |
| --------------- | ----------------- |
| Inflection 3 Pi | `inflection_3_pi` |

## Related

#### [Integrations](/providers/integrations)

Connect your Inflection AI API key.

#### [Language models](/providers/model/overview)

Compare every language model provider Vapi supports.