ModelPricing.aiGPT-5 Nano API Pricing
GPT-5 Nano costs $0.050 per million input tokens and $0.400 per million output tokens on the OpenAI API. Prices are tracked from the official OpenAI pricing table and used by the ModelPricing.ai estimation API, so this page and the API always quote the same numbers. See all OpenAI model pricing or the full LLM pricing comparison.
GPT-5 Nano Pricing Per Million Tokens
| Tier | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M |
|---|---|---|---|---|
| Standard | $0.050 | $0.400 | $0.0050 | — |
What GPT-5 Nano Costs In Practice
Monthly cost at three representative workloads, using the standard text rate in effect today.
| Workload | Monthly cost |
|---|---|
| Light — 1M in / 200K out | $0.1300 |
| Moderate — 10M in / 2M out | $1.30 |
| Heavy — 100M in / 20M out | $13.00 |
Need your own numbers? Use the LLM cost calculator or call the estimation API directly.
Compare GPT-5 Nano With Other Models
GPT-5 Nano Pricing FAQ
How much does GPT-5 Nano cost per token?
GPT-5 Nano costs $0.050 per million input tokens and $0.400 per million output tokens on the OpenAI API. That works out to $0.0001 per thousand input tokens.
How much does it cost to run GPT-5 Nano per month?
At 1M in / 200K out per month, GPT-5 Nano costs about $0.1300. A heavier workload of 100M input and 20M output tokens costs about $13.00.
Does GPT-5 Nano support prompt caching?
Yes. Cached input tokens are billed at $0.0050 per million on GPT-5 Nano, compared with $0.050 per million for uncached input.
Estimate GPT-5 Nano costs programmatically
POST a token count to /v1/estimate with model gpt-5-nano and get a priced breakdown back, promotions
already applied.