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

# Important Information

> API requirements, limitations, and supported models

## Supported Models

The API currently supports the following models:

* **v6**
* **v6.1**
* **niji 6**
* **v7** (default)
* **v8** — add `--v 8` to your prompt. Premium tier with `--hd`, `--q 4`, and `--sv 6` (4x cost). \[Sunsetting soon — see below.]
* **v8.1** — add `--v 8.1` to your prompt. SD output by default (1×); add `--hd` for native 2K (1.5×). Pro subscription required.

<Warning>
  Midjourney plans to sunset **v8.0** approximately 2 weeks after v8.1 stabilizes. We recommend migrating `--v 8` prompts to `--v 8.1` ahead of time.
</Warning>

## Current Limitations

The API currently does **not** support the following features:

* `--repeat` parameter
* `--personalize` parameter
* `{}` prompt arrangement syntax
* `--stealth`/`--public` parameters

## Important Usage Requirements

* **When using enhance**: The original job must be created in draft mode with parameters `--v7 --draft`
* **Draft mode**: Ultra-fast image prototyping (10x faster than normal mode) with slightly reduced quality but consuming only half the GPU resources. Use `--draft` parameter to activate.

## Supported Speed Modes

Speed modes control the GPU type used for task execution, determining task execution time. The API provides **fast mode** and **turbo mode**, with **relax mode** currently not supported.

### Fast Mode (`--fast`)

Fast mode is the default GPU speed mode where API requests are prioritized using GPU resources for processing. Usually completes image generation within 1 minute.

* **Usage**: Activated with `--fast` parameter
* **Default**: Used when no speed mode is specified
* **Processing Time**: Typically under 1 minute for standard images

### Turbo Mode (`--turbo`)

Turbo mode uses a high-performance GPU pool with processing speeds up to 4x faster than fast mode. This mode consumes double the GPU time quota and only supports v5 and above versions.

* **Usage**: Activated with `--turbo` parameter
* **Speed**: Up to 4x faster than fast mode
* **Requirements**: Only supports v5+ versions
* **Cost**: Consumes double GPU time quota
* **Status**: Experimental feature - availability and billing may change

### Factors Affecting Task Time

* **Image Resolution**: Higher resolution images require more processing time
* **Aspect Ratio**: Non-standard ratios may increase processing time
* **Model Version**: Newer models are typically faster
* **Task Type**: Generation variations or lower quality settings reduce time
* **Image Prompts**: Number of referenced images in prompts affects processing time