Openapis

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💬 Community: https://telegram.me/openapis

OpenAPIs
Free Claude API + free OpenAI API in one unified proxy. Drop-in compatible with the official Anthropic SDK, OpenAI SDK, Claude Code CLI, OpenCode, and any OpenAI-compatible client. 100+ models — Claude Opus 4.7, Sonnet 4.6, Haiku 4.5, GPT-5.5, GPT-5.4-mini, GPT-5.3-codex — totally free during the open beta.

 

OpenAPIs is a unified proxy to OpenAI and Anthropic. Drop-in compatible with their official SDKs — just swap the base_url, keep your code.

🎁 Open Beta — Free
Currently in open beta. Completely free access while the beta lasts.

🧪 My Personal Use — Proof of Concept

Here are some screenshots from my own usage of the OpenAPIs:

Why OpenAPIs

Set up your env vars (recommended)

The official OpenAI and Anthropic SDKs read these variables automatically, so you never have to pass base_url or api_key in code.

Quickstart

OpenAI

curl — with streaming

Python — official SDK

Anthropic

curl — with streaming

Python — official SDK

Claude Code (CLI)

OpenCode (CLI)

Available models (100+)

OpenAI — endpoint /openai
- gpt-5.5 · gpt-5.5-pro
- gpt-5.4-mini · gpt-5.4-nano · gpt-5.4-pro · gpt-5.4-thinking
- gpt-5.3-codex · gpt-5.3-instant
- … the entire GPT-5 family with all snapshots

Anthropic — endpoint /anthropic
- claude-opus-4-7 · claude-opus-4-6
- claude-sonnet-4-6 · claude-sonnet-4-5
- claude-haiku-4-5 · claude-haiku-4
- … the full Claude catalog (3.x → 4.x)

Compatible stack

Anything that speaks the OpenAI or Anthropic Messages API format works out of the box:

- OpenAI SDK (Python, Node, Go, Java, .NET)
- Anthropic SDK (Python, Node)
- Claude Code — Anthropic's…