The OpenAI API alternative that runs every model

G0I is a drop-in OpenAI-compatible API — keep your existing code, get instant access to 470+ frontier models from every major lab, not just one.

If you have built on the OpenAI API, switching to G0I takes one line: change your base URL to https://g0i.ai/v1. Your OpenAI SDK, your request format, and your response parsing all stay exactly the same.

Why teams move to G0I

Every model, one key — GPT, Claude Opus & Sonnet, Gemini, Llama, DeepSeek, Qwen and 470+ more. No separate accounts, no separate billing.
Drop-in compatible — built to the OpenAI API spec. Chat completions, streaming, tool calling, vision — all supported.
No vendor lock-in — route each request to the best or cheapest model for the job, and switch any time by changing one field.
Image & video generation — the same key also generates images and video.

Switch in three steps

1 · Create an accountSign up at g0i.ai and grab an API key in seconds — no card required to start.

2 · Change one linePoint your existing OpenAI SDK at https://g0i.ai/v1. Same request shape, same response shape.

3 · Call any modelSwap the model field to use GPT, Claude, Gemini, Llama, DeepSeek and 470+ others — one key, one bill.

Same code, more models

curl https://g0i.ai/v1/chat/completions \
  -H "Authorization: Bearer $G0I_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.4","messages":[{"role":"user","content":"Hello"}]}'

See the full model catalog or compare plans on the pricing page.

Get your API key — start free →

Frequently asked questions

Is G0I really OpenAI-compatible?
Yes. G0I implements the OpenAI API spec, so existing OpenAI SDK code works by changing only the base URL to https://g0i.ai/v1.

Which models can I use?
Over 470 models including GPT, Claude Opus and Sonnet, Gemini, Llama, DeepSeek and Qwen — all through the same endpoint and the same API key.

Do I need a credit card to start?
No. You can create an account and start with a free token quota, then upgrade when you need more.