o3-pro

OpenAIMCP Tool CallReasoning

openai/o3-proClosed API

High-effort o3 tier for difficult technical reasoning and careful answers

Benchmark Pricing$20.00 / 1M in$80.00 / 1M out

Context: 200,000 tokens•Max Output: 100,000 tokens•Knowledge: 2024-05•Released: 2025-06-10

TECHNICAL SPECIFICATIONS

Context Window200,000200K tokens

Max Output100,000100K tokens

LicenseProprietaryCloud API only

Input Modalities

TextVision

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ o3-pro natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 200,000 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

STANDARDIZED BENCHMARKS & EVALS

Aider Polyglotpercent correct

84.9

API CALL INVOCATION EXAMPLE

// Example: Calling o3-pro via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY,
});

const response = await client.chat.completions.create({
  model: "openai/o3-pro",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);