Overview

Synthorai is an enterprise-grade LLM proxy that unifies access to the world's top AI models through a multi-protocol API — keep using your preferred SDK (OpenAI, Anthropic) and call 30+ providers with a single key.

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Synthorai speaks three input protocols on the same base URL: OpenAI Chat Completions (/v1/chat/completions), OpenAI Responses (/v1/responses), and Anthropic Messages (/v1/messages). Point your existing OpenAI or Anthropic SDK at the gateway — no code changes beyond baseURL and key.

What is Synthorai?

Synthorai provides a unified entry point for models from OpenAI, Anthropic, Google, Alibaba Qwen, DeepSeek, and dozens of other providers. You can reach every routed model through the OpenAI-compatible /v1/chat/completions endpoint, or use a provider's native protocol — Anthropic Messages for Claude / Bedrock workflows, OpenAI Responses for tool-use and reasoning. A single key covers all paths, with automatic routing, rate limiting, quota management, and audit logging built in.

It is designed for enterprise deployments requiring data residency, compliance, and access control.

Key Features

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Single API Key

One key for all models and protocols. Fine-grained quota per user or team.

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Multi-Protocol API

OpenAI SDK (/v1/chat/completions, /v1/responses) or Anthropic SDK (/v1/messages) — no rewrites.

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Guardrails

Input/output filtering with custom rule engines.

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Analytics

Per-model, per-user request and token usage dashboards.

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Global Models

OpenAI, Anthropic, Google, Qwen, DeepSeek, GLM, Kimi, MiniMax and more.

Base URL

https://synthorai.io

New here? Start with the Quickstart, then browse the model price comparison for every routable model's per-token pricing, or project your workload's spend with the LLM API cost calculator.