> 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.

1. **New GPT-4.1 Models Available**: You can now use `'gpt-4.1'`, `'gpt-4.1-mini'`, and `'gpt-4.1-nano'` as options for the `model` and `fallbackModels` with your [OpenAI models](https://api.vapi.ai/api#:~:text=OpenAIModel). These models may offer improved performance or features over previous versions.

![New GPT-4.1 Models Available](/_fern-img/809eda27f6d932c1333804d4793e4be755a88443b5ac486fa0127cd46cb489d4.webp)