> ## 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)


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