§.FAQ
How much does a single call cost?
Typical cost ranges for the most common models and an example calculation.
Updated 2026-04-13
Cost is determined by tokens in × input rate + tokens out × output rate. Here's a rough guide for a medium-length prompt call (say, 2,000 tokens in, 500 tokens out):
| Model | Rough cost per call |
|---|---|
| Claude Opus 4.6 | $0.0225 |
| Claude Sonnet 4.6 | $0.0135 |
| Claude Haiku 4.5 | $0.0045 |
| GPT-4.1 | $0.008 |
| GPT-4.1 Mini | $0.0016 |
| GPT-4.1 Nano | $0.0004 |
| Gemini 2.5 Pro | $0.0075 |
| Gemini 2.5 Flash | $0.00185 |
PromptAssay doesn't take a cut
Every call bills your provider account directly — we don't mark up tokens and we don't meter your usage for billing. The usage dashboard shows the cost at your provider's published rate.