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o3

by openai

Reasoning

Description

o3 is OpenAI's flagship reasoning model with exceptional performance on complex mathematical, scientific, and coding tasks. Features advanced chain-of-thought reasoning with configurable compute levels.

Pricing

Input /1M tokens
Output /1M tokens
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Specifications

Context200K tokens
Parameters
Licenseproprietary
ReleasedApr 2025

Capabilities

ReasoningVisionToolsJSON ModeStreaming

EU-Compliant API Access

Use o3 with a simple API call. OpenAI-compatible endpoint, EU data residency guaranteed.

JavaScript
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: "o3",
    messages: [
      { role: "user", content: "Hello!" }
    ],
  }),
});

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

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