OpenAI Decisions API cost calculator
Monthly cost of OpenAI Decisions API at 10k to 10M requests, worked out from its list price of $0.1 in / $0 out per 1M tokens.
Classification500 in · 5 out tokens
| Requests / month | gpt-6-luna |
|---|---|
| 10k | $0.50 |
| 100k | $5.00 |
| 1M | $50.00 |
| 10M | $500 |
Formula: 1,000,000 requests × (500 in × $0.1 + 5 out × $0) ÷ 1,000,000
Chatbot turn1,000 in · 300 out tokens
| Requests / month | gpt-6-luna |
|---|---|
| 10k | $1.00 |
| 100k | $10.00 |
| 1M | $100 |
| 10M | $1,000 |
Formula: 1,000,000 requests × (1,000 in × $0.1 + 300 out × $0) ÷ 1,000,000
Agent loop step4,000 in · 500 out tokens
| Requests / month | gpt-6-luna |
|---|---|
| 10k | $4.00 |
| 100k | $40.00 |
| 1M | $400 |
| 10M | $4,000 |
Formula: 1,000,000 requests × (4,000 in × $0.1 + 500 out × $0) ÷ 1,000,000
Price notes
- OpenAI Decisions API · gpt-6-luna. Input only; no output, cache-read or cache-write charges. Regional processing premiums and long-context multipliers apply (amounts not stated on the guide).
- List prices before free allowances and taxes. Presets are our assumptions, not vendor figures.
FAQ
How much does OpenAI Decisions API cost per month?
At $0.1 in / $0 out per 1M tokens (gpt-6-luna), 1M chatbot-size requests (1,000 input, 300 output tokens) cost $100 a month, and 100k classification requests cost $5.00. Prices verified 2026-10-17.
Does OpenAI Decisions API have a free tier?
No free allowance is listed with the price we checked; the tables show list prices.
How is the cost calculated?
1,000,000 requests × (1,000 in × $0.1 + 300 out × $0) ÷ 1,000,000 = $100 for 1M chatbot requests. Change requests and tokens in the calculator to match your workload.
SourcesPricing pages
- 1OpenAI Decisions API pricingdevelopers.openai.com/api/docs/guides/decisionsVerified 2026-10-17