GreenPT is now available on Opper AI

GreenPT’s European inference is now available through Opper AI, the leading European AI gateway for agents. Teams on Opper can route to GreenPT with a single model string, without changing SDKs or setting up a new integration.

What is Opper AI?

Opper AI is the European AI gateway for agents, based in Stockholm. It gives developers access to 700+ leading AI models through one EU-hosted, GDPR-compliant API, pay-as-you-go, with spend caps, model allowlists and zero data retention. Instead of integrating every model provider separately, teams connect to Opper once and choose the model per task.

What’s available

Our current catalogue of open-weight models, including Kimi K3, GLM-5.3, GLM-5.3-Flash, DeepSeek V4.1 Flash and MiniMax M2.5. All GreenPT routes on Opper are EU-hosted. Opper keeps the live list, with context windows, pricing and data handling per model, on its GreenPT provider page.

What you keep

Your prompts and outputs are processed in the EU, on renewable energy, and never used to train models. On top of that, Opper adds automatic fallbacks, tracing and Rules for every call: spend limits, data retention, model access, content checks and routing order. You can pin GreenPT for a specific task or set it as a fallback.

“More of the teams we talk to get asked what their AI runs on, not only what it costs. GreenPT has built its whole platform around answering that question, and with it on the gateway our developers can choose renewable-powered European inference by changing a model string.”

Göran Sandahl, co-founder and CEO, Opper AI

How to start

Opper is compatible with the OpenAI SDK, so it’s an API key and a model string:

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.OPPER_API_KEY,
  baseURL: "https://api.opper.ai/v3/compat",
});

const completion = await client.chat.completions.create({
  model: "greenpt/glm-5.3",
  messages: [{ role: "user", content: "Hello" }],
});

The Opper quick start covers fallbacks and structured output.

Already using the GreenPT API directly? Nothing changes. This is an extra route, not a replacement.

“We started GreenPT because there should be an alternative to Big Tech AI: efficient, honest about what it costs, and not built on your data. Opper puts that alternative in front of a wide community of builders through a single API, and we’re curious what they build on it.”

Robert Keus, co-founder and CEO, GreenPT

• Read Opper’s announcement
• GreenPT API docs