OpenAI API pricing
The GPT-5 family — now led by GPT-5.6 (Sol, Terra and Luna) alongside GPT-5.5, GPT-5.4, mini and nano. The default starting point for most teams.
OpenAI models — price per 1M tokens
All prices in USD, last verified 2026-06-27. Cheapest reference cost first; click a column to re-sort.
| Model | Input /1M | Output /1M | Cost / call* | Context | Type |
|---|---|---|---|---|---|
| GPT-5.4 nano Cheapest OpenAI tier | $0.200 | $1.25 | $0.0015 | 400K | Fast / cheap |
| GPT-5.4 mini | $0.750 | $4.50 | $0.0053 | 400K | Balanced |
| GPT-5.6 Luna Cheapest GPT-5.6 · budget frontier | $1.00 | $6.00 | $0.0070 | 400K | Balanced |
| GPT-5.6 Terra Daily driver · ½ the cost of GPT-5.5 | $2.50 | $15.00 | $0.017 | 400K | Flagship |
| GPT-5.4 Balanced flagship | $2.50 | $15.00 | $0.017 | 400K | Flagship |
| GPT-5.6 Sol New flagship · limited preview | $5.00 | $30.00 | $0.035 | 400K | Flagship |
| GPT-5.5 Flagship | $5.00 | $30.00 | $0.035 | 400K | Flagship |
*Reference cost of one call with 1,000 input + 1,000 output tokens — a neutral yardstick. Use the calculator for your real usage. Cheapest row highlighted.
How OpenAI API pricing works
OpenAI bills per token: an input price for everything you send and a higher output price for what the model generates, both quoted per million tokens. To estimate a real bill, multiply by your monthly request volume — the cost calculator does this across every model at once.
Before committing to volume, always confirm the current numbers on the official OpenAI pricing page — the list prices here are verified periodically but the market moves fast.