GPT-4.1 Nano

Deprecated

OpenAI · April 2025

OpenAI is retiring this model on 23 October 2026. After that date it will not be available for new work.

The smallest GPT-4.1. Built for simple, high-volume conversation.

Best for: Everyday chat
Superseded by: GPT-5 Nano

Context window
1,047,576 tokens
≈ 786,000 words · about 3,140 pages
Max output
32,768 tokens
≈ 25,000 words in a single answer
Knowledge cutoff
June 2024
its training cutoff

Modalities

TextInput and output
ImageInput only
AudioNot supported
VideoNot supported

Features

StreamingSupported
Function callingSupported
Structured outputsSupported
Fine-tuningSupported

Tools

Web searchNot supported
Hosted shellNot supported
Apply patchNot supported
Tool searchNot supported

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