GPT-5.5 Pro · 1M input tokens

One million input tokens on GPT-5.5 Pro at $30 per million. Pro spends more compute per request, so some calls take minutes; it is sold through the Responses API only.

What you get

• 1M tokens of input tokens on one API key. Order several units to stack tokens on the same key.
• A personal API key for gpt-5.5-pro, issued automatically once your order is completed.
• Priced at $30.00 per million input tokens. Source: OpenAI's own pricing page.
• 1,050,000 context · 128,000 max output · reasoning effort: medium / high / xhigh · vision: Yes
• No shipping: delivery is digital, under My Account > Order History and by email.

Capabilities

• 1.05M context
• 128K output
• More compute
• Responses API only
• Batch eligible

Best for

Tough problems where a first-time-correct answer pays for itself.

Quick start

# pip install openai   (the sample below calls the endpoint directly)

import os, requests

resp = requests.post(
    "https://api.openai.com/v1/responses",
    headers={
        "Authorization": "Bearer " + os.environ["OPENAI_API_KEY"],
        "Content-Type": "application/json",
    },
    json={
        "model": "gpt-5.5-pro",
        "input": "Write a one-sentence bedtime story about a unicorn.",
    },
)
print(resp.json()["output"][0]["content"][0]["text"])