AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

GPT-4.1 nano vs GPT-5.4-Pro

OpenAI
GPT-4.1 nano
OpenAI
GPT-5.4-Pro
Overview
CompanyOpenAIOpenAI
Release dateApr 14 2025Mar 5 2026
AccessProprietaryProprietary
Specifications
Context window
1M
Benchmarks
Web browsing
BrowseComp
89.3%
Multidisciplinary reasoning
Humanity's Last Exam · with tools
58.7%
Abstract reasoning
ARC-AGI-2
83.3%
Advanced math
FrontierMath · Tier 1–3
50%
Advanced math
FrontierMath · Tier 4
38%
Science
GPQA Diamond
94.4%
Knowledge work
GDPval (win/tie rate)
82%
Timeline
Release gapGPT-4.1 nano shipped 325 days before GPT-5.4-Pro

Which is better: GPT-4.1 nano or GPT-5.4-Pro?

GPT-4.1 nano and GPT-5.4-Pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-4.1 nano shipped 325 days before GPT-5.4-Pro, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — GPT-4.1 nano and GPT-5.4-Pro don't publish scores on any of the same benchmarks.

Frequently asked questions

GPT-4.1 nano was released by OpenAI on Apr 14 2025.

GPT-5.4-Pro was released by OpenAI on Mar 5 2026.

Other comparisons