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GPT-5 Nano token cost
OpenAI · context 128,000 tokens · tokenizer Exact
Open in cost calculator · Count tokens · Full calculator · Official pricing
When to use GPT-5 Nano
Cheapest GPT-5 family tier for classification, routing, and ultra-high QPS text jobs. Use when Mini is still too expensive and Exact OpenAI counts matter for budgeting.
Pricing
- Input
- $0.050/1M
- Output
- $0.400/1M
- Cached input
- $0.005/1M
- Batch input
- $0.025/1M
- Verified
Official pricing source · Open main calculator · Cheaper long context models
Estimate with TokenCalculator
Preselect GPT-5 Nano in the calculator to count tokens and project request or monthly cost. Exact vs Approx follows this model's tokenizer family. See the Exact vs Approx guide for honesty rules.
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Estimate API cost · Count tokens · Check context fit · Estimate cache savings · Compare batch pricing · Token visualizer
Related guides
LLM API pricing · Exact vs Approx · OpenAI token calculator · o200k vs cl100k: which OpenAI encoding counts your text?
Sources and references
Official documentation used for definitions, counting methods, or rate cards. Always confirm critical budgets on the provider page.