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GPT-4.1 nano

ECI#153
130
OpenAI
Apr. 14, 2025
Closed weights

GPT-4.1 nano is a closed-weights model from OpenAI, released April 14, 2025. It has an ECI score of 130 and ranks 153rd of 249 tracked models. At the time of its release, it ranked 30th of 126 tracked models.

GPT-4.1 nano vs select alternatives

DomainBenchmark
GPT-4.1 nano
OpenAI
Apr. 14, 2025
Closed weights
GPT-4o (May 2024)
OpenAI
May 13, 2024
Closed weights
o1-preview
OpenAI
Sep. 12, 2024
Closed weights
Llama 4 Scout
Meta AI
Apr. 5, 2025
Open weights
ECI scoreBest score 166
130129135130
Ranking#153#156#135#152
Conceptual reasoning
ARC-AGI-2Best score 95%
0%
n/a
n/a
0%
ARC-AGI-1Best score 99%
0%
n/a
18%
1%
Long context
Fiction.liveBenchBest score 97%
25%
n/a
n/a
36%
Mathematics
MATH Level 5Best score 98%
70%
51%
82%
62%
OTIS Mock AIME 2024-2025Best score 100%
29%
6%
31%
8%
Science
CritPtBest score 32%
0%
n/a
n/a
0%
SciCodeBest score 62%
26%
n/a
n/a
17%
GPQA DiamondBest score 96%
49%
49%
50%
52%
Software engineering
WeirdML (v2)Best score 93%
19%
n/a
48%
n/a

Model metadata

General
OrganizationOpenAI
Release dateApr. 14, 2025
Model accessibilityClosed weights
CountryUnited States of America
Knowledge cutoff2024-05-31
Provider notesIntroducing GPT-4.1 in the API: A new series of GPT models featuring major improvements on coding, instruction following, and long context—plus our first-ever nano model.
Pricing
Input price$0.10 / 1M tokens
Output price$0.40 / 1M tokens
Training
ParametersUnknown
Training computeUnknown
Training hardwareUnknown
Training timeUnknown
Training dataset sizeUnknown