OpenAI GPT-4.1 models promise improved coding and instruction following

OpenAI has announced a new family of models, GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano, which it says outperforms GPT-4o and GPT-4o mini “across the board.”

In conjunction with the launch of the GPT-4.1 family, OpenAI also announced that it is deprecating GPT-4.5 Preview in the API. GPT-4.5 Preview will be turned off completely on July 14, 2025, because GPT-4.1 offers similar or better performance for many functions at lower cost and latency, the company said.

OpenAI said that the new models have significantly larger context windows than their predecessors—one million tokens, compared to GPT-4o’s 128,000—and offer improved long-context comprehension. Output token limits have also been increased from 16,385 in GPT-4o to 32,767 in GPT-4.1.