How do I get OpenAI API access through LLMsRelay?

Create or select an sk-cs4 key in the Codex group, then call https://api.llmsrelay.com/v1 with model gpt-5.5. Use Basic or Pro keys for Claude models. No OpenAI account required.

Which OpenAI models are available?

Request the latest OpenAI models such as gpt-5.5. Call GET https://api.llmsrelay.com/v1/models with your key for the live list.

Do I need an OpenAI account?

No. LLMsRelay provides OpenAI API access through your existing LLMsRelay credits and a Codex-group key — no OpenAI account, no waitlist.

Which key group should I use?

Use Codex for OpenAI/GPT models and Basic or Pro for Claude/Anthropic models. The account balance is shared, but each key has one active group.

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OpenAI API Access — No OpenAI Account, Pay-as-You-Go

Access the OpenAI API through LLMsRelay with a Codex-group key, OpenAI-compatible endpoints, the latest OpenAI models, and pay-as-you-go billing.

TL;DR

LLMsRelay gives you OpenAI API access through the same account and credits you use for Claude. Select the Codex group on the key and call the OpenAI-compatible endpoints at https://api.llmsrelay.com/v1.

Choose the correct key group

Use a key in the Codex group for OpenAI/GPT models and/v1/chat/completions or /v1/responses. Use Basic or Profor Claude/Anthropic models. The balance is shared by the account, but the key's active group controls which model family it can call.

Why LLMsRelay for the OpenAI API

No OpenAI account — no separate signup, no organization verification, no waitlist.
Latest OpenAI models — request the current models (e.g. gpt-5.5); call GET /v1/models for the live list.
Correct routing — use Basic/Pro keys for Claude and Codex keys for OpenAI/GPT models.
Fully OpenAI-compatible — Chat Completions and Responses APIs, OpenAI SDK, Codex CLI, and OpenAI-compatible IDEs.
Shared billing — use one-time credits across Claude and OpenAI-compatible models.

Quick start

OpenAI SDK against LLMsRelaypython

from openai import OpenAI

client = OpenAI(
    api_key="sk-cs4-your-key",
    base_url="https://api.llmsrelay.com/v1",
)

resp = client.chat.completions.create(
    model="gpt-5.5",
    messages=[{"role": "user", "content": "Write a haiku about TCP."}],
)
print(resp.choices[0].message.content)

Where to go next

Codex CLI & Extension — Responses API setup.
OpenAI-Compatible IDEs — Cline, Roo, Continue.
OpenAI & Codex API Reference — endpoints, models, billing.

Ready to start?

Create a key and configure a compatible API route in under 2 minutes.

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