GPT-5.6 Series is now live on CometAPI โ†’

GPT-4.1 Nano Blog

GPT-4.1: What Is It & How Can You Use It?
Jan 6, 2026
GPT-4.1
GPT-4.1 Mini
GPT-4.1 Nano
OpenAI

GPT-4.1: What Is It & How Can You Use It?

On April 14, 2025, OpenAI unveiled GPT-4.1, its most advanced language model to date, marking a significant milestone in artificial intelligence development.

GPT-4.1 Nano API
Jan 6, 2026
GPT-4.1
GPT-4.1 Nano
OpenAI

GPT-4.1 Nano API

The GPT-4.1 Nano API is OpenAI's most compact and cost-effective language model, designed for high-speed performance and affordability. It supports a context window of up to 1 million tokens, making it ideal for applications requiring efficient processing of large datasets, such as customer support automation, data extraction, and educational tools.

OpenAI Launches GPT-4.1 Series: Pioneering AI Advancements
Jan 6, 2026
GPT-4.1
GPT-4.1 Mini
GPT-4.1 Nano
OpenAI

OpenAI Launches GPT-4.1 Series: Pioneering AI Advancements

On April 14, 2025, OpenAI unveiled its latest suite of AI models: GPT-4.1, GPT-4.1 Mini, and GPT-4.1 Nano. These models represent significant advancements in