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

# API Reference

> Gravitex API complete documentation

## Overview

Gravitex API provides RESTful endpoints compatible with the OpenAI API format. Use the unified gateway `https://api.gravitex.ai` for chat, completions, embeddings, images, video, audio, and more.

## AI model APIs

<CardGroup cols={3}>
  <Card title="Model list" icon="list" href="/en/api-reference/endpoint/list-models">
    List available models
  </Card>

  <Card title="Chat" icon="comments" href="/en/api-reference/endpoint/chat-openai">
    OpenAI-compatible chat completions
  </Card>

  <Card title="Claude messages" icon="message" href="/en/api-reference/endpoint/messages">
    Anthropic Claude Messages API
  </Card>

  <Card title="Responses" icon="reply" href="/en/api-reference/endpoint/responses-openai">
    OpenAI Responses API
  </Card>

  <Card title="Completions" icon="file-lines" href="/en/api-reference/endpoint/completions">
    Legacy text completions
  </Card>

  <Card title="Embeddings" icon="database" href="/en/api-reference/endpoint/embeddings/create-embedding">
    Text embeddings (OpenAI / Engines format)
  </Card>

  <Card title="Rerank" icon="magnifying-glass" href="/en/api-reference/endpoint/rerank">
    Document reranking
  </Card>

  <Card title="Moderations" icon="shield-check" href="/en/api-reference/endpoint/moderations">
    Content safety moderation
  </Card>

  <Card title="Audio" icon="headphones" href="/en/api-reference/endpoint/audio">
    OpenAI speech/STT and Gemini native TTS
  </Card>

  <Card title="Realtime" icon="tower-broadcast" href="/en/api-reference/endpoint/realtime">
    Real-time audio (WebSocket)
  </Card>

  <Card title="Images" icon="image" href="/en/api-reference/endpoint/image-generation">
    Unified image generation
  </Card>

  <Card title="Gemini OpenAI (Images)" icon="image" href="/en/api-reference/endpoint/nano-banana">
    Gemini imagine T2I / I2I via /images/generations
  </Card>

  <Card title="Gemini OpenAI (Chat)" icon="comments" href="/en/api-reference/endpoint/gemini-chat-openai">
    Gemini chat & multimodal via /chat/completions
  </Card>

  <Card title="Gemini native (image)" icon="image" href="/en/api-reference/endpoint/gemini-image">
    generateContent / Chat image output
  </Card>

  <Card title="GPT-Image-2" icon="image" href="/en/api-reference/endpoint/gpt-image-2">
    OpenAI GPT-Image-2 text/image-to-image
  </Card>

  <Card title="Qwen Image" icon="image" href="/en/api-reference/endpoint/qwen-image">
    Qwen text-to-image and editing
  </Card>

  <Card title="Image edits" icon="pen" href="/en/api-reference/endpoint/image-edits">
    POST /v1/images/edits
  </Card>

  <Card title="Video overview" icon="video" href="/en/api-reference/endpoint/video-generation">
    Multi-model video overview
  </Card>

  <Card title="Submit / query video" icon="video" href="/en/api-reference/endpoint/submit-video-task">
    Unified POST /v1/video/generations
  </Card>

  <Card title="Wan 2.7" icon="video" href="/en/api-reference/endpoint/wan2.7">
    Alibaba Wan 2.7 video models
  </Card>

  <Card title="Wan 2.7 Video Editing" icon="video" href="/en/api-reference/endpoint/wan2.7-videoedit">
    wan2.7-videoedit instruction-based editing
  </Card>

  <Card title="Veo" icon="video" href="/en/api-reference/endpoint/veo">
    Google Veo video generation
  </Card>

  <Card title="Seedance 2.0(/generations)" icon="video" href="/en/api-reference/endpoint/seedance-2.0">
    Doubao Seedance 2.0 and asset library
  </Card>

  <Card title="Seedance 2.0(/generations/tasks)" icon="video" href="/en/api-reference/endpoint/seedance-2.0-new">
    Official mirror API (BytePlus Ark compatible)
  </Card>
</CardGroup>

## General

<Columns cols={2}>
  <Card title="Supported models" icon="cube" href="/en/api-reference/models">
    Model matrix and selection guide
  </Card>

  <Card title="OpenAI SDK" icon="code" href="/en/api-reference/openai-sdk">
    SDK examples in multiple languages
  </Card>

  <Card title="Query video task" icon="search" href="/en/api-reference/endpoint/query-video-task">
    Poll video task status
  </Card>

  <Card title="Download video" icon="download" href="/en/api-reference/endpoint/download-video">
    Download video (Sora 2)
  </Card>
</Columns>