OpenAI API · verified September 25, 2026
GPT-6 Luna API pricing: $0.10 in / $0.50 out
Cheapest GPT-6 model.
Input /1M$0.10
Output /1M$0.50
Context1.05M
ReleasedSep 22, 2026
What real jobs cost
| 1,000 short chats | $0.28 |
| Summarise 100 long reports (20k tokens each) | $0.25 |
| Write a 90,000-word book | $0.06 |
| 10M input + 2M output tokens | $2.00 |
Estimates at the listed price. Use the calculator for your own numbers.
Similar-priced models
| Model | In | Out |
|---|---|---|
| DeepSeek V4.1-Flash DeepSeek AI | $0.15 | $0.60 |
| Mistral Small 4 Mistral AI | $0.15 | $0.60 |
| GPT-5.6 Luna OpenAI | $0.20 | $1.20 |
| GPT-5.4 nano OpenAI | $0.20 | $1.25 |
| Gemini 3.1 Flash-Lite Google | $0.25 | $1.50 |
| Mistral Large 3 Mistral AI | $0.50 | $1.50 |
Price history
No price or plan changes recorded since we started tracking. We re-check every week.
Other OpenAI models
- GPT-6 Astra $10 / $50
- GPT-6 Sol $2 / $10
- GPT-5.6 Sol $4 / $20
- GPT-5.6 Terra $2 / $12
- GPT-5.6 Luna $0.20 / $1.20
- GPT-5.5 pro $30 / $180
- GPT-5.4 nano $0.20 / $1.25
GPT-6 Luna pricing questions
How much does GPT-6 Luna cost?
$0.10 per million input tokens and $0.50 per million output tokens, with a 1.05M context window. Cheapest GPT-6 model.
How much does 1,000 chats cost on GPT-6 Luna?
About $0.28, assuming 800 input and 400 output tokens per chat.
Sources
Checked against the official pages below on September 25, 2026. Prices are USD before local tax. See how we verify prices and the change log.