GPT-5.4 Nano | Epoch AI

ECI#71

146

OpenAI

Mar. 17, 2026

Closed weights

GPT-5.4 Nano is a closed-weights model from OpenAI, released March 17, 2026. It has an ECI score of 146 and ranks 71st of 249 tracked models. At the time of its release, it ranked 27th of 196 tracked models.

GPT-5.4 Nano vs select alternatives

Domain	Benchmark	GPT-5.4 Nano OpenAI Mar. 17, 2026 Closed weights	o4-mini OpenAI Apr. 16, 2025 Closed weights	o3 OpenAI Apr. 16, 2025 Closed weights	GLM-5 Z.ai (Zhipu AI) Feb. 11, 2026 Open weights
	ECI scoreBest score 166	146	146	147	146
	Ranking	#71	#74	#60	#70
Conceptual reasoning	ARC-AGI-2Best score 95%	6%	6%	7%	5%
	ARC-AGI-1Best score 99%	52%	59%	61%	45%
Games	Chess PuzzlesBest score 72%	30%	26%	38%	10%
	Mystery Game PuzzlesBest score 84%	9%	5%	29%	n/a
Mathematics	FrontierMath Tiers 1-3 (v2)Best score 94%	45%	36%	33%	n/a
	FrontierMath Tier 4 (v2)Best score 98%	12%	5%	n/a	n/a
	OTIS Mock AIME 2024-2025Best score 100%	88%	82%	84%	80%
Science	GPQA DiamondBest score 96%	78%	80%	82%	88%
World knowledge	SimpleQA VerifiedBest score 76%	12%	20%	49%	n/a

Model metadata

General
Organization	OpenAI
Release date	Mar. 17, 2026
Model accessibility	Closed weights
Country	United States of America
Knowledge cutoff	Unknown
Provider notes	Introducing GPT‑5.4 mini and nano

Pricing
Input price	$0.20 / 1M tokens
Output price	$1.25 / 1M tokens

Training
Parameters	Unknown
Training compute	Unknown
Training hardware	Unknown
Training time	Unknown
Training dataset size	Unknown