ModelOpenAI · Joined Apr 14, 2025 · GPT-4.x

GPT-4.1 nano

Model at OpenAI

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162nd of 270 on Epoch Capabilities Index
Cheapest of 5 similar models by price

GPT-4.1 nano does not have a researched profile yet. Everything here comes from its recorded changes and public listings, each linked to its source.

The basics

As of Nov 1

Status: Retired
Price: $0.10 in, $0.40 outPer 1M tokens, since Apr 14
Context: 1.05M tokens
Open weights: No

Updates

Retired

Legacy GPT, o-series and GPT Image 1 snapshots shut down on October 23

OpenAI shut down the legacy snapshots it announced on April 22, 2026, on October 23, 2026. They include gpt-3.5-turbo, gpt-4, gpt-4-turbo, gpt-4.1-nano, gpt-image-1, o1, o1-pro, o3-mini, o4-mini and gpt-4o-2024-05-13, plus several fine-tuned versions.

Action needed:: Switch to gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna, or gpt-image-2.5-sunburst or gpt-image-2.5-flare as listed on the page.

Retiring

Legacy GPT, o-series and gpt-image-1 snapshots to shut down October 23, 2026

OpenAI announced that gpt-3.5-turbo, gpt-4, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1, o1-pro, o3-mini and o4-mini (plus several fine-tuned bases) shut down on October 23, 2026. Substitutes are GPT-5.6 Sol, Terra or Luna and GPT Image 2.5.

Action needed:: Migrate before October 23, 2026 to the listed GPT-5.6 or GPT Image 2.5 substitute.

Full changelog, by month

Role

General-purpose model at OpenAI

GPT-5.4 nanoMar 2026 to now · 8 months
GPT-5 nanoAug 2025 to Mar 2026 · 7 months
GPT-4.1 nano
Apr 2025 to Aug 2025 · 4 months

Similar models

$2 in, $8 out

$0.40 in, $1.60 out

$2.50 in, $10 out

Similar models for now. Real viewing data comes after launch.

Cost vs peers

Cheapest of 5 similar models by output price.

GPT-4.1 nano$0.40 out · $0.10 in
GPT-4o mini$0.60 out · $0.15 in
GPT-4.1 mini$1.60 out · $0.40 in
GPT-4.1$8 out · $2 in
GPT-4o$10 out · $2.50 in

Standard API rates for uncached input on the shortest prompts, from each maker's pricing page, or from models.dev for models not researched here yet.

Where it works

Place	Type	Price per 1M tokens, in / out	Uptime
Azure	API host	$0.10 / $0.40	100%

Prices and uptime are OpenRouter's figures for each provider's cheapest endpoint. Uptime covers the last 24 hours.

Benchmarks

Higher is better. Green is GPT-4.1 nano. Dark marks are similar models.

Independent

What people say

Reviews

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Used GPT-4.1 nano? Tell other builders what worked and what did not.

Writing habits

Creative writing · EQ-Bench, among 51 models tracked here

Slop score

44.9

Overused AI words and phrases. Less slop than 2% of tracked models.

Repetition

6.7

Repeated words and ideas. Less repetition than 6% of tracked models.

Story length

6,190

Average characters per story. Longer than 50% of tracked models.