OpenAI-Compatible API Gateways: A 2026 Buyer’s Guide

An OpenAI-compatible gateway lets you keep your existing OpenAI SDK code and reach dozens of models — just change the base_url and API key.

Why use one

• One key, many models: GPT, Claude, Gemini, DeepSeek behind a single account.
• No code rewrite: your OpenAI client mostly just works.
• Local payments & routing: especially useful in Asia.

What to look for

1. Model coverage — does it carry the models you need?
2. Price — check per-model rates on the models page.
3. Uptime — see the reliability ranking.
4. Payments — card / Alipay / USDT? Filter on providers.
5. Transparency — clear pricing and a real changelog beat vague promises.

Pick one

Browse all providers, then compare 2–4 side by side.

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Reference data — verify on the provider's official site.