OpenAI

OpenAI: GPT-4.1 nano

This model is deprecated

GPT-4.1 nano and can no longer be run here. Its evaluation results and details remain available for reference. Try GPT-5.4 Nano instead.

GPT-4.1 nano Overview

GPT-4.1 nano, released by OpenAI in April 2025, is the smallest and most cost-efficient member of the GPT-4.1 family. It is multimodal, supporting both text and image inputs, and retains the family’s extended 1 million-token context window—allowing it to handle large documents or codebases despite its lightweight design. Its training knowledge extends to June 2024.

GPT-4.1 nano prioritizes speed and affordability over raw reasoning power. While less capable than GPT-4.1 and GPT-4.1 mini, it is well-suited for high-volume or latency-sensitive workloads such as classification, autocomplete, content moderation, and lightweight assistants. This makes it an attractive option for developers seeking scalable deployment where efficiency is more critical than deep reasoning.

GPT-4.1 nano Details & Performance

Details

Resources

Vision Tasks

Vision LanguageObject DetectionClassificationOCRVisual Question AnsweringCaptioning

Features

Foundation VisionLLMs with Vision CapabilitiesMultimodal Vision

Usage

Past 30 Days

Not available

Not in Playground

Performance

Avg. Latency

Arena Rankings

GPT-4.1 nano Vision Evals

#62 of 70 models|

Pass/fail results across 67 image tasks

Overall Score40.3%across 67 eval prompts
Prompts Passed27 / 675 task categories
Avg Response Time2.36son eval prompts
Median tokens / task2.9K in · 6 out~$0.0003 / task · 67/67 tasks
Score key:≥75%40–74%<40%
CategoryPassedScore
Object Understanding9 / 14
64.3%
Spatial Understanding8 / 19
42.1%
Defect Detection6 / 15
40%
Document Understanding3 / 9
33.3%
Object Counting1 / 10
10%

Scores based on single evaluation run · Methodology

View all Vision Evals →

GPT-4.1 nano Pricing

GPT-4.1 nano costs $0.100 per 1M input tokens and $0.400 per 1M output tokens.

Input$0.100 / 1M tokens
Output$0.400 / 1M tokens
Cached input$0.025 / 1M tokens

Pricing updated Jun 22, 2026

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GPT-4.1 nano License

Proprietary

License terms and commercial-use guidance for GPT-4.1 nano.

License information is provided as a guide and is not legal advice.