OpenAI: GPT-5 Nano API Pricing
Live token cost for OpenAI: GPT-5 Nano from OpenAI. Use the figures below for budgeting, then tune your exact request mix in the interactive calculator. Prices refresh every 24 hours from OpenRouter.
Capabilities
OpenAI: GPT-5 Nano cost at scale
Estimated monthly cost across common production volumes. Assumes 30-day months and the request shapes shown.
| Tier | Requests / day | In / out tokens | $ / month |
|---|---|---|---|
| Hobby | 1,000 | 500 / 200 | $3.15 |
| Startup | 10,000 | 1,500 / 500 | $82.50 |
| Growth | 100,000 | 3,000 / 800 | $1,410.00 |
| Enterprise | 1,000,000 | 8,000 / 2,000 | $36,000.00 |
| Enterprise (batch mode) | 1,000,000 | 8,000 / 2,000 | $18,000.00 |
Compare OpenAI: GPT-5 Nano vs.
Frequently asked questions
How much does OpenAI: GPT-5 Nano cost?
OpenAI: GPT-5 Nano costs $0.05 per 1M input tokens and $0.40 per 1M output tokens, with cached input at $0.01 per 1M tokens. A typical 1,500-token in / 500-token out request costs $0.00027.
Does OpenAI: GPT-5 Nano support cached input?
Yes. OpenAI: GPT-5 Nano supports prompt caching at $0.01 per 1M cached input tokens. Reuse the same system prompt or context across requests to cut input cost dramatically.
What is the OpenAI: GPT-5 Nano context window?
OpenAI: GPT-5 Nano supports a context window of 400,000 tokens (400K).
What is OpenAI: GPT-5 Nano good for?
OpenAI: GPT-5 Nano is a good fit for frontier reasoning, agentic tool use, code generation, multimodal analysis. For other use cases, run your specific input/output mix through the interactive calculator to compare against alternative models.