OpenAI o3-Pro API

openai/o3-pro
o3‑Pro is OpenAI’s advanced model focused on precision, reasoning, and reliability for enterprise and developer use.
Context
200K tokens
Input
$27.508 / 1M tokens
Output
$110.032 / 1M tokens

How to use OpenAI o3-Pro API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to openai/o3-pro.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "openai/o3-pro",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/o3-pro",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/o3-pro","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

OpenAI o3-Pro API Pricing

TypePrice
Input
$27.508 / 1M tokens
Output
$110.032 / 1M tokens

OpenAI o3-Pro Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
Intelligence
21.9
Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026

OpenAI o3-Pro vs other models

ModelInputOutputContextBest for
OpenAI o3-Pro
This page
$27.508 / 1M tokens
$110.032 / 1M tokens
200K tokens
Reasoning + agents
$6.5 / 1M tokens
$39 / 1M tokens
1.05M tokens
Reasoning + agents
$2.6 / 1M tokens
$13 / 1M tokens
1M tokens
Balanced coding + agents
$3.9 / 1M tokens
$19.5 / 1M tokens
1M tokens
Long-context, multimodal & agentic workflows
$0.65 / 1M tokens
$3.9 / 1M tokens
1.05M tokens
Reasoning + agents

Frequently asked questions

OpenAI o3-Pro has a 200,000 tokens context window.

OpenAI o3-Pro takes image, text as input and returns text.

Use openai/o3-pro as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

OpenAI o3-Pro is priced at input $27.508 / 1M tokens, output $110.032 / 1M tokens.

Yes, OpenAI o3-Pro can stream responses as they are generated.

Yes, OpenAI o3-Pro accepts image input alongside text.

OpenAI o3-Pro was built by OpenAI.

Yes, o3-Pro is designed as a reasoning model with deep deliberation for complex tasks.

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