GPT-5 nano
Released
GPT-5 nano is an AI model released by OpenAI on Thursday, Aug 7 2025, the same day as GPT-5 mini.
API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $0.05
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.005
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $0.40
Available from
| Azure | — | $0.05 | $0.40 | 400K |
|---|---|---|---|---|
| Azure | swedencentral | $0.055 | $0.44 | 400K |
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Frequently asked questions
GPT-5 nano was released by OpenAI on Thursday, Aug 7 2025.
GPT-5 nano was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
GPT-5 nano costs $0.05 per million input tokens and $0.40 per million output tokens through the OpenAI API. Cached input is $0.005 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.
No. GPT-5 nano is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
OpenAI's previous tracked release was GPT-5 mini on Aug 7 2025. It was followed by GPT-5 Pro on Aug 7 2025.