OpenAI Compatible, Zero Migration Cost
Just replace the Base URL and API Key; existing OpenAI SDK code and mainstream clients can be switched without modification.
Basic Introduction
Welcome to 4ALL API. 4ALL API is an enterprise-grade large model API aggregation gateway: one API Key provides unified access to GPT, Claude, Gemini conversational models, image and video generation, and 200+ models. It is fully compatible with the OpenAI interface protocol, and migration can be completed in just three minutes.
- The unified endpoint is
https://api.4allapi.com/v1; - Existing OpenAI SDK / clients only need to replace the Base URL and API Key, with no code changes required;
- Console entry: api.4allapi.com, register to view balance and available models.
📖 Product Basics
Quick Start Register an account, create a token, and send your first request in three steps.
API Manual Authentication, Chat Completions, streaming output, and error codes.
Changelog Site updates such as new models and feature changes.
Pricing Two billing methods, pay-as-you-go and pay-per-use, plus quota rules.
🔧 Core APIs
Chat Completions API Chat Completions — the main interface for multi-turn conversation and text generation.
Popular Models Right Now Real-time list and selection recommendations for GPT / Claude / Gemini and free models.
Image and Video Generation Models Overview of currently available image/video models and naming conventions.
Balance Query API OpenAI-compatible billing interface for programmatically querying quota and usage.
⚡ API Capabilities
🎬 Video Generation API
Video Generation (Asynchronous Protocol) A unified async flow of submit task → poll results, suitable for all video models.
VEO 3.1 Series Google VEO, text-to-video / image-to-video / reference-to-video, standard, fast, and lite tiers.
Omni Flash / Abra Series Fast video models supporting 4s–10s duration and landscape/portrait aspect ratios.
🎨 Image Generation API
GPT-Image Generation The full gpt-image-2 series, supporting fast acceleration and 2K/4K resolution.
Nano Banana Generation Gemini image generation and editing, with multiple aspect ratios available.
🔧 Basic APIs
Claude Native Calling Direct connection using Anthropic's native Messages format.
Gemini Native Calling Direct connection using Google's native generateContent format.
Image Understanding (Vision) Visual understanding capabilities such as OCR, chart interpretation, and multi-image comparison.
Text Embedding Text vectorization for semantic search and RAG.
🎯 Use Cases
💬 Conversational AI
Cherry Studio A desktop AI client with multi-model switching.
Chatbox Cross-platform desktop AI chat application.
Open WebUI A self-hosted web chat interface.
💻 Programming Development
Claude Code Anthropic's official AI coding assistant.
Cursor An AI-powered code editor.
Cline(VS Code) An AI coding extension in VS Code.
🔧 Technical Engineering and Translation
LangChain Integration for AI application development frameworks.
Dify Integration for visual AI application development platforms.
Immersive Translate A browser extension for bilingual side-by-side reading.
🚀 Why Choose 4ALL API
Comprehensive Models, Fast Updates
Unified access to GPT, Claude, Gemini conversational series as well as image and video generation models, with new models launched as soon as they are available.
Transparent Billing
Pay-as-you-go / pay-per-use billing, no charge for failed requests; every call is visible in console logs, and balance can be queried via API.
Data Security
Transparent forwarding, no retention of conversation content; tokens can have quotas and expiration dates, with clear permission boundaries.