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One API, Unlimited Possibilities: Access GPT-5, Claude Opus 4.1, Gemini 2.5 Pro, and more models without juggling multiple providers.

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What is MegaLLM?

MegaLLM is your “super-API” for AI. Instead of integrating with OpenAI, Anthropic, Google, and other providers separately, you get access to all their models through one unified interface.

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Why MegaLLM?

  • Instant Model Switching: Change models with one parameter
  • Automatic Fallbacks: Never go down when one model fails
  • Unified Billing: One invoice for all your AI usage
  • Zero Integration Overhead: Drop-in replacement for existing code

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Quick Start

Models Catalog

Browse 70+ AI models with pricing and capabilities

Quick Start

Get your API key and make your first request

OpenAI API

Use OpenAI-compatible endpoints with any model

Anthropic API

Access Claude models with Anthropic format

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Core Features

Automatic Fallback

Ensure high availability with intelligent model switching

Authentication

Simple API key management and security

FAQ

Frequently asked questions and troubleshooting

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Who Uses MegaLLM?

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Developers

  • Experiment with different models without rewriting code
  • Reduce integration complexity from weeks to minutes
  • Build more robust applications with automatic fallbacks

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Businesses

  • Ensure high availability for customer-facing AI features
  • Optimize costs across multiple model providers
  • Future-proof AI investments with provider flexibility

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Researchers

  • Access cutting-edge models as they’re released
  • Run comprehensive evaluations and benchmarks
  • Test model performance across different tasks

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Example: Switching Models

from openai import OpenAI

client = OpenAI(
    base_url="https://ai.megallm.io/v1",
    api_key="your-api-key"
)

# Try GPT-5 for complex reasoning
response = client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "Analyze this data..."}]
)

# Switch to Claude for analysis
response = client.chat.completions.create(
    model="claude-3.7-sonnet",
    messages=[{"role": "user", "content": "Analyze this data..."}]
)

# Use Claude for creative writing
response = client.chat.completions.create(
    model="claude-opus-4-1-20250805",
    messages=[{"role": "user", "content": "Write a story about..."}]
)
Use CasePrimary ModelFallback ModelsWhy
Chatbotsgpt-4o-minigpt-3.5-turbo, claude-3.5-sonnetFast, cost-effective
Code Generationgpt-5claude-3.7-sonnet, gpt-4oSpecialized for code
Analysisclaude-opus-4-1-20250805gpt-5, gemini-2.5-proBest reasoning
Creative Writingclaude-opus-4-1-20250805gpt-5, claude-sonnet-4Creative excellence

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Getting Started

Ready to get started? Head to our Quick Start guide to make your first API call in minutes.

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3-Step Setup

  1. Get API Key: Sign up and get your MegaLLM API key
  2. Choose Format: Use OpenAI or Anthropic API format
  3. Start Building: Make your first request to any of 70+ models

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Need Help?

  • Browse our guides: Comprehensive documentation for every feature
  • Check the FAQ: Common questions and solutions
  • Contact support: support@megallm.io for technical assistance
  • Use search: Press Cmd+K to search all documentation