GPT-5 Nano

GPT-5 Nano is OpenAI's fastest, most cost-effective GPT-5 variant, optimized for rapid classification and summarization tasks, supporting multimodal inputs and tool calling.

GPT-5 Nano, released by OpenAI on August 7, 2025, is a compact, high-efficiency language model designed for speed and cost-effectiveness. It excels at tasks like summarization and classification, offering a 400,000-token context window and generating up to 128,000 tokens in output. This model supports multimodal inputs (including images), function calling, and a configurable 'reasoning effort' setting for optimized performance. GPT-5 Nano is available through the OpenAI API and Azure, with pricing at $0.05 per million input tokens and $0.40 per million output tokens.

https://openai.com/models/gpt-5-nano