Tools
OpenAI API pricing calculator
Pick a model, enter tokens per request and monthly request volume, and see the estimated monthly bill at the vendor's published price beside the corouter price. Estimates update as you type and the URL stays shareable.
From the blog
- How to estimate your monthly LLM API costForecasting an inference bill is arithmetic, not prophecy. Here is the method: four numbers to log, one formula, and the mistakes that make estimates come in low.Read the post
- What prompt caching is actually worthCached input is billed at roughly a tenth of the normal input rate. Here is what qualifies, what silently does not, and how to structure prompts so the discount applies.Read the post
Prices in USD per million tokens, verified against official pricing pages on 2026-07-29.
Estimates only. Actual billing depends on your real token counts, cache hit rate, and the prices in effect at request time.