OpenAI: GPT-5 Nano

openai/gpt-5-nano

Created Aug 7, 2025400,000 context

$0.05/M input tokens$0.40/M output tokens$10/K web search

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.

OpenAI: GPT-5 Nano

openai/gpt-5-nano

Created Aug 7, 2025400,000 context

$0.05/M input tokens$0.40/M output tokens$10/K web search

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.

Recent activity on GPT-5 Nano

Total usage per day on OpenRouter

Prompt

2.55B

Reasoning

746M

Completion

122M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.