Openai: gpt-5.5-pro
gpt-5.5-pro
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The GPT-5.5 Pro model is a more powerful version of GPT-5.5, designed for difficult problems and tasks that require greater accuracy and reasoning. According to OpenAI’s official documentation, this model uses more compute for reasoning to provide smarter and more accurate responses, making it suitable for tasks such as research, information analysis, programming, complex problem-solving, and multi-step tasks. GPT-5.5 Pro supports text and image input and supports tools such as web search, file search, code execution, and image generation through the API.
Pricing
Current price per 1,000,000 tokens. Every request is billed automatically from its exact usage.
Included in plans
Statistics
Live performance and usage of this model, aggregated across all users.
Detailed statistics appear here as soon as this model starts receiving requests.
API
Call this model from any OpenAI-compatible client using your API token.
curl https://apiex.cloud/api/v1/chat/completions \
-H "Authorization: Bearer $NEW_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5-pro",
"messages": [
{
"role": "user",
"content": "Explain quantum entanglement in one paragraph."
}
],
"temperature": 0.7
}'Authentication
Every request must include an Authorization: Bearer <TOKEN> header. Generate a token from your account's API Keys page — its access to models is set automatically from your active plans and redeemed codes, and you can set its rate limit and IP restrictions.
| Parameter | Type | Description |
|---|---|---|
model | string, required | This model's ID, exactly as shown above. |
messages | array, required | Conversation history as role/content objects (system, user, assistant). |
temperature | number, optional | Sampling randomness, typically 0–2. |
max_tokens | integer, optional | Upper limit on tokens generated in the reply. |
top_p | number, optional | Nucleus-sampling threshold, as an alternative to temperature. |
stream | boolean, ignored | Responses are always returned in full so the exact cost can be billed; streaming is not available. |
Replace YOUR_API_KEY with a token from your account, then see the full API reference for every parameter.
Frequently asked questions
What is gpt-5.5-pro?
The GPT-5.5 Pro model is a more powerful version of GPT-5.5, designed for difficult problems and tasks that require greater accuracy and reasoning. According to OpenAI’s official documentation, this model uses more compute for reasoning to provide smarter and more accurate responses, making it suitable for tasks such as research, information analysis, programming, complex problem-solving, and multi-step tasks. GPT-5.5 Pro supports text and image input and supports tools such as web search, file search, code execution, and image generation through the API.
How much does gpt-5.5-pro cost?
Input tokens are priced at $36,00 per 1,000,000 tokens and output tokens at $216,00 per 1,000,000 tokens. Pricing is billed automatically per request; no separate plan is required.
What is the context length of gpt-5.5-pro?
gpt-5.5-pro supports a context window of up to 1,050,000 tokens.
Does gpt-5.5-pro support image input?
Yes, gpt-5.5-pro accepts image input in addition to text.
Which provider is gpt-5.5-pro from?
gpt-5.5-pro is developed by Openai and made available on this gateway through our routing infrastructure.
When was gpt-5.5-pro added to this gateway?
gpt-5.5-pro has been available on this gateway since September 23, 2026.
Is gpt-5.5-pro currently available?
Yes, gpt-5.5-pro is active and can be used right now through this gateway.