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 counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.
Modalities
In / Out Price
Low
$0.05 / $0.40per 1M
Context
High
400K
Released
Aug 7, 2025
Knowledge Cutoff
May 2024