GPT-5 nano pricing
OpenAI · list prices as of 2026-09-29
| Input | $0.05 per 1M tokens |
|---|---|
| Output | $0.40 per 1M tokens |
| Cached input (read) | $0.005 per 1M tokens |
| Batch / async | 50% off |
| Context window | 400K tokens |
| Longest answer | 128K tokens |
What a call costs
| Typical call | Input tokens | Output tokens | Per call | Per month at 1,000 a day |
|---|---|---|---|---|
| Chat reply | 1,000 | 300 | $0.00017 | $5.10 |
| Document summary | 6,000 | 400 | $0.00046 | $13.80 |
| Code change | 3,000 | 1,200 | $0.00063 | $18.90 |
No caching or batch discount. Your own prompt will differ: count it exactly below.
Price your own prompt on GPT-5 nanoSimilarly priced models
- Mistral Small 3 (Mistral): 1.1× more
- Gemini 2.5 Flash-Lite (Google): 1.3× more
- GPT-4.1 nano (OpenAI): 1.3× more
- GPT-4o mini (OpenAI): 1.9× more
- Llama 4 Scout (Meta): 2.1× more
Questions
How much does GPT-5 nano cost?
GPT-5 nano costs $0.05 per million input tokens and $0.40 per million output tokens, as of 2026-09-29.
How much is one GPT-5 nano call?
A call with 1,000 input tokens and a 300-token answer costs about $0.00017, or $5.10 a month at 1,000 calls a day.
How big is the GPT-5 nano context window?
400,000 tokens.