GPT-4.5 | Epoch AI

ECI#136

136

OpenAI

Feb. 27, 2025

Closed weights

GPT-4.5 is a closed-weights model from OpenAI, released February 27, 2025. It has an ECI score of 136 and ranks 136th of 240 tracked models. At the time of its release, it ranked 5th of 95 tracked models.

GPT-4.5 vs select alternatives

Domain	Benchmark	GPT-4.5 OpenAI Feb. 27, 2025 Closed weights	o1 OpenAI Dec. 17, 2024 Closed weights	Claude 3.7 Sonnet Anthropic Feb. 24, 2025 Closed weights	DeepSeek-R1 DeepSeek Jan. 20, 2025 Open weights
	ECI scoreBest score 173	136	141	141	139
	Ranking	#136	#117	#118	#129
Conceptual reasoning	SimpleBenchBest score 95%	35%	40%	46%	31%
	ARC-AGI-2Best score 95%	1%	n/a	1%	1%
	ARC-AGI-1Best score 99%	10%	31%	29%	16%
Mathematics	MATH Level 5Best score 98%	79%	95%	91%	93%
	OTIS Mock AIME 2024-2025Best score 100%	38%	73%	58%	53%
Science	Humanity's Last ExamBest score 55%	5%	8%	8%	n/a
	GPQA DiamondBest score 97%	69%	77%	79%	69%
Software engineering	Aider PolyglotBest score 88%	45%	62%	65%	57%
Other	LiveBenchBest score 82%	69%	76%	76%	72%

Model metadata

General
Organization	OpenAI
Release date	Feb. 27, 2025
Model accessibility	Closed weights
Country	United States of America
Knowledge cutoff	2023-10-01
Provider notes	Introducing GPT-4.5

Pricing
Input price	$75 / 1M tokens
Output price	$150 / 1M tokens

Training
Parameters	Unknown
Training compute	3.8e26 FLOP
Training hardware	Unknown
Training time	125 days
Training dataset size	Unknown