AI model · OpenAI
GPT-5 Nano
Model ID: openai/gpt-5-nano
- Input
- $0.05 per 1M tokens
- Output
- $0.40 per 1M tokens
- Context
- 400K tokens at once
- Max output
- 128K tokens per reply
- Released
- 7 Aug 2025 OpenAI
What it can do
- YesReasoning
- YesTool calling
- YesImage input
- NoOpen weights
- NoFree to use
Takes text, image, file; gives text.
How its listing describes it
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...
Sources
- OpenAI: GPT-5 Nano on OpenRouter — read 2 Oct 2026