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OpenAI: GPT-5 Nano API pricing
Last updated
- Input / 1M tokens
- $0.05
- Output / 1M tokens
- $0.40
- Blended / 1M
- $0.137
- 3:1 input:output
- Context window
- 400K
- tokens
- Arena Elo
- 1200
Context window
How much text fits in a single request.
400,000 tokens, roughly 300K words or 600 pages of English text.
Estimate assumes ~0.75 words per token and 500 words per page. Input and output share this limit.
Price history
USD per 1M tokens at each recorded price change.
| Date | Input / 1M | Output / 1M | Blended / 1M | Change |
|---|---|---|---|---|
| $0.05 | $0.40 | $0.137 | Launch |
Changelog
Notable updates to OpenAI: GPT-5 Nano.
OpenAI: GPT-5 Nano is now tracked with input at $0.05 and output at $0.40 per 1M tokens, a 400,000-token context window, and an Elo score of 1200.
Summaries are AI-generated from tracked data changes.