FreeBrain / Pricing / GPT-5.5

GPT-5.5 API

Use GPT-5.5 by OpenAI with the client you already have: change the base URL to FreeBrain and the model ID to gpt-5.5. $0.50 per 1M input tokens, 90% below the list price.

Call it

Replace YOUR_API_KEY with a key from the FreeBrain console. More setups are in the quick start.

OpenAI Python SDK (Chat Completions)

from openai import OpenAI

client = OpenAI(base_url="https://api.thefreebrain.com/v1", api_key="YOUR_API_KEY")
reply = client.chat.completions.create(model="gpt-5.5",
    messages=[{"role": "user", "content": "Say hello from the gateway."}])
print(reply.choices[0].message.content)

curl (Chat Completions)

curl https://api.thefreebrain.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5.5", "messages": [{"role": "user", "content": "Hello"}]}'

Questions

How much does GPT-5.5 cost on FreeBrain?

$0.50 per 1M input tokens and $3.00 per 1M output tokens (snapshot 2026-10-08), compared with OpenAI's list price of $5.00 and $30.00. You pay as you go from a prepaid balance.

Which endpoints support GPT-5.5?

OpenAI Chat Completions (https://api.thefreebrain.com/v1/chat/completions).

Can I use GPT-5.5 with the OpenAI SDK?

Yes. Keep the tool, set its base URL to FreeBrain and use the model ID gpt-5.5. The examples on this page show the exact settings.

Do I need an OpenAI account?

No. A FreeBrain API key is enough; the same key calls every model in the catalog.

More OpenAI models

• GPT-6.1 Sol — $0.20 / $1.00 per 1M tokens
• GPT-6 Astra — $1.00 / $5.00 per 1M tokens
• GPT-6 Sol — $0.20 / $1.00 per 1M tokens
• GPT-5.6 Sol — $0.50 / $3.00 per 1M tokens
• GPT-5.6 Terra — $0.20 / $1.20 per 1M tokens
• GPT-5.6 Luna — $0.05 / $0.30 per 1M tokens

Prices are per 1 million tokens in US dollars, from the catalog snapshot of 2026-10-08. Rates can change; the console shows the price of every call. Endpoints as listed in the model plaza on 2026-10-08. Contact: info@thefreebrain.com