OpenAI API pricing
GPT-5 nano pricing
Input / 1M tokens
$0.05
Output / 1M tokens
$0.40
Cached input / 1M
$0.005
Source: OpenAI pricing, checked 1 Nov 2026. API name: gpt-5-nano.
Price your prompt on GPT-5 nano
What a prompt costs on GPT-5 nano
| Example | Tokens in / out | Cost | 1,000 a day, per month |
|---|---|---|---|
| A short question and answer | 50 / 300 | $0.0001 | $3.67 |
| A one-page document summarised | 700 / 400 | $0.0002 | $5.85 |
| A 300-line code file reviewed | 4,000 / 1,200 | $0.0007 | $20.40 |
| A 50-page report summarised | 35,000 / 1,500 | $0.0024 | $70.50 |
Token sizes are typical, not exact. Replies include any thinking the model does.
Other GPT models
GPT-6 AstraGPT-6.1 SolGPT-6.1 TerraGPT-6 LunaGPT-5.5GPT-5.4 mini
FAQ
How much does GPT-5 nano cost?
$0.05 per million input tokens and $0.40 per million output tokens on OpenAI's standard API tier, and $0.005 per million for cached input. Checked 1 Nov 2026.
What does one prompt cost on GPT-5 nano?
A 1,000-token prompt with a typical medium-length reply costs about $0.0004. Paste your own prompt into the calculator for an exact figure.