OpenAI ChatGPT API pricing
OpenAI API prices for all 23 ChatGPT models, per million tokens. The cheapest is gpt-5-nano at $0.05 input and $0.4 output; the most expensive is gpt-6-astra at $10 input and $50 output.
Prices updated October 28, 2026
OpenAI model prices
| Model | Input / 1M | Cached input / 1M | Output / 1M | Typical request |
|---|---|---|---|---|
| gpt-5-nano | $0.05 | $0.005 | $0.4 | $0.00025 |
| gpt-6-luna | $0.1 | $0.01 | $0.5 | $0.00035 |
| gpt-4o-mini | $0.15 | $0.075 | $0.6 | $0.00045 |
| gpt-5.6-luna | $0.2 | $0.02 | $1.2 | $0.0008 |
| gpt-5.4-nano | $0.2 | $0.02 | $1.25 | $0.000825 |
| gpt-4.1-mini | $0.4 | $0.1 | $1.6 | $0.0012 |
| gpt-5-mini | $0.25 | $0.025 | $2 | $0.00125 |
| gpt-5.4-mini | $0.75 | $0.075 | $4.5 | $0.003 |
| gpt-6.1-terra | $1 | $0.05 | $5 | $0.0035 |
| gpt-4.1 | $2 | $0.5 | $8 | $0.006 |
| o3 | $2 | $0.5 | $8 | $0.006 |
| gpt-5 | $1.25 | $0.125 | $10 | $0.00625 |
| gpt-5.1 | $1.25 | $0.125 | $10 | $0.00625 |
| gpt-6-sol | $2 | $0.2 | $10 | $0.007 |
| gpt-6.1-sol | $2 | $0.1 | $10 | $0.007 |
| gpt-4o | $2.5 | $1.25 | $10 | $0.0075 |
| gpt-5.6-terra | $2 | $0.2 | $12 | $0.008 |
| gpt-5.2 | $1.75 | $0.175 | $14 | $0.00875 |
| gpt-5.4 | $2.5 | $0.25 | $15 | $0.01 |
| gpt-5.6 | $4 | $0.4 | $20 | $0.014 |
| gpt-5.6-sol | $4 | $0.4 | $20 | $0.014 |
| gpt-5.5 | $5 | $0.5 | $30 | $0.02 |
| gpt-6-astra | $10 | $1 | $50 | $0.035 |
Sorted by the cost of a typical request of 1,000 input and 500 output tokens. Open a model for batch prices, context window and example costs.
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