openai
OpenAI: GPT-5 Nano API Pricing
OpenAI: GPT-5 Nano costs $0.050 per 1M input tokens and $0.400 per 1M output tokens (cache reads: $0.0050). Context window: 400K. Prices verified 2026-08-23 · source
Input / 1M tokens
$0.050
Output / 1M tokens
$0.400
Context window
400K
Max output
128K
What would OpenAI: GPT-5 Nano cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $2.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $6.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $12.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $2.80 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: GPT-5 Nano
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...