OpenAI SDK Compatible API Providers 2026: Complete List

The OpenAI SDK has become the de facto standard for AI API integration. But you're not limited to OpenAI's models. Several providers now offer OpenAI-compatible APIs, letting you switch models without changing your code. Here's the complete list for 2026.

Why OpenAI SDK Compatibility Matters

• Zero migration cost: Change the base URL and API key, keep everything else
• Ecosystem support: LangChain, LlamaIndex, AutoGen all use OpenAI SDK
• Familiar interface: chat.completions.create() works everywhere
• No lock-in: Switch providers in seconds

OpenAI-Compatible Providers

How to Use Any Provider with OpenAI SDK

from openai import OpenAI

# Just change base_url and api_key — that's it
providers = {
    "aipower": ("https://api.aipower.me/v1", "your-aipower-key"),
    "openrouter": ("https://openrouter.ai/api/v1", "your-openrouter-key"),
    "together": ("https://api.together.xyz/v1", "your-together-key"),
    "openai": ("https://api.openai.com/v1", "your-openai-key"),
}

base_url, api_key = providers["aipower"]
client = OpenAI(base_url=base_url, api_key=api_key)

# This exact code works with ALL providers above
response = client.chat.completions.create(
    model="deepseek/deepseek-chat",  # Model naming varies by provider
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Key Differences

AIPower vs OpenRouter

• AIPower has 10 Chinese AI models (DeepSeek, Qwen, GLM, Kimi, Doubao) — OpenRouter has none
• AIPower has smart routing (auto, auto-cheap, auto-best) — OpenRouter doesn't
• AIPower supports WeChat Pay — OpenRouter doesn't
• OpenRouter has more total models (100+) but most are niche or redundant

AIPower vs Together AI

• Together focuses on open-source model hosting
• AIPower bridges Chinese + Western proprietary models
• Together has GPU inference for custom models

Choosing the Right Provider

• Need Chinese AI models: AIPower is the only option with full Chinese model coverage
• Need maximum model variety: OpenRouter has the most models
• Need open-source hosting: Together AI or Fireworks
• Need fastest inference: Groq (specialized hardware)
• Need smart routing: AIPower is the only one with built-in auto-routing

Try AIPower at aipower.me — the only OpenAI-compatible gateway with Chinese AI models, smart routing, and WeChat Pay. 50 free API calls included.