Openai: gpt-5-nano
gpt-5-nano
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gpt-5-nano is presented as a very small, lightweight variant within a hypothetical GPT-5 family, following OpenAI’s established convention where “nano” usually signals a model tuned for low latency and very low cost rather than maximum capability. Models in this tier are typically optimized for simple tasks like short-form text generation, basic reasoning, and lightweight assistants that can run cheaply at scale or on resource-constrained environments. While it would inherit core GPT-style language modeling abilities, it would be significantly less powerful than full-size flagship models and more focused on efficiency than state-of-the-art performance. Public, detailed specifications for a model specifically called “gpt-5-nano” are not available as of the latest widely published OpenAI documentation, so it should be understood as a small, efficiency-focused tier rather than a confirmed, fully documented production release.
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-nano",
"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-nano?
gpt-5-nano is presented as a very small, lightweight variant within a hypothetical GPT-5 family, following OpenAI’s established convention where “nano” usually signals a model tuned for low latency and very low cost rather than maximum capability. Models in this tier are typically optimized for simple tasks like short-form text generation, basic reasoning, and lightweight assistants that can run cheaply at scale or on resource-constrained environments. While it would inherit core GPT-style language modeling abilities, it would be significantly less powerful than full-size flagship models and more focused on efficiency than state-of-the-art performance. Public, detailed specifications for a model specifically called “gpt-5-nano” are not available as of the latest widely published OpenAI documentation, so it should be understood as a small, efficiency-focused tier rather than a confirmed, fully documented production release.
How much does gpt-5-nano cost?
Input tokens are priced at $0,06 per 1,000,000 tokens and output tokens at $0,48 per 1,000,000 tokens. Pricing is billed automatically per request; no separate plan is required.
What is the context length of gpt-5-nano?
gpt-5-nano supports a context window of up to 400,000 tokens.
Does gpt-5-nano support image input?
Yes, gpt-5-nano accepts image input in addition to text.
Which provider is gpt-5-nano from?
gpt-5-nano is developed by Openai and made available on this gateway through our routing infrastructure.
When was gpt-5-nano added to this gateway?
gpt-5-nano has been available on this gateway since September 23, 2026.
Is gpt-5-nano currently available?
Yes, gpt-5-nano is active and can be used right now through this gateway.