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

# AI Models Reference

> Quick reference for AI model IDs and providers

This is a quick reference for AI model identifiers. For guidance on when to use each model, see [Choosing an AI Model](/building-apps/choosing-a-model).

***

## Model IDs

| Model               | ID                              | Provider  |
| ------------------- | ------------------------------- | --------- |
| **Opus 4.5**        | `claude-opus-4-5-20251101`      | Anthropic |
| **Opus 4.5 - High** | `claude-opus-4-5-20251101-high` | Anthropic |
| **Sonnet 4.5**      | `claude-sonnet-4-5-20250929`    | Anthropic |
| **Haiku 4.5**       | `claude-haiku-4-5-20251001`     | Anthropic |
| **GPT-5.1**         | `gpt-5.1`                       | OpenAI    |
| **GPT-5.1 - High**  | `gpt-5.1-high`                  | OpenAI    |
| **Gemini 3 Pro**    | `gemini-3-pro-preview`          | Google    |

***

## Reasoning levels

| Level        | Models                              |
| ------------ | ----------------------------------- |
| **Standard** | Sonnet 4.5, Haiku 4.5, Gemini 3 Pro |
| **Medium**   | Opus 4.5, GPT-5.1                   |
| **High**     | Opus 4.5 - High, GPT-5.1 - High     |

Higher reasoning produces better results for complex tasks but uses more credits.

***

## What's next

* Learn when to use each model: [Choosing an AI Model](/building-apps/choosing-a-model)
* Explore keyboard shortcuts: [Keyboard Shortcuts](/reference/keyboard-shortcuts)
* Read the full glossary: [Glossary](/reference/glossary)