GPT-OSS 120B

Description

GPT-OSS-120B is OpenAI's open-weight MoE model with 117B total parameters and 5.1B active per token. Features native MXFP4 quantization to run on a single H100 GPU, configurable reasoning levels (low/medium/high), function calling, web browsing, Python code execution, and structured outputs. Near-parity with o4-mini on core reasoning benchmarks.

Providers

Capabilities

EU-Compliant API Access

Use GPT-OSS 120B with a simple API call. OpenAI-compatible endpoint, EU data residency guaranteed.

const response = await fetch("https://api.eurouter.ai/v1/chat/completions", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": `Bearer ${process.env.EUROUTER_API_KEY}`,
  },
  body: JSON.stringify({
    model: "gpt-oss-120b",
    messages: [
      { role: "user", content: "Hello!" }
    ],
  }),
});

const data = await response.json();
console.log(data.choices[0].message.content);