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GPT-5 nano
OpenAI · Text · Jan 2026
Smallest GPT-5 tier — ultra-cheap classification and routing at massive scale.
High-volume / cheapChat / Assistant
Input price
$0.15
per 1M tokens
Output price
$0.60
per 1M tokens
Context window
128K
tokens
Modality
Text
supported
Provider
OpenAI
vendor
Released
Jan 2026
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Frequently asked questions
- How much does GPT-5 nano cost?
- GPT-5 nano costs $0.15 per 1M input tokens and $0.60 per 1M output tokens.
- What is GPT-5 nano's context window?
- GPT-5 nano supports a context window of 128K tokens.
- What is GPT-5 nano best for?
- GPT-5 nano is well suited for High-volume / cheap, Chat / Assistant. Smallest GPT-5 tier — ultra-cheap classification and routing at massive scale.
- Who makes GPT-5 nano?
- GPT-5 nano is built by OpenAI. It was released in Jan 2026.