Model
Model explorer

GPT-4.1 nano

CLOSED
OpenAI · GPT-4.1 family · released Apr 14, 2025

Fastest, cheapest GPT-4.1-family model; 1M-token context, no reasoning mode.

ReasoningCodingVisionFunction callingTool useAgentic
887.9
Elo · rank #238
Parameters
Undisclosed
Active params
—
Context
1M tokens
Architecture
Dense transformer (exact size undisclosed)
License
Proprietary (OpenAI API Terms)
Languages
—
API price (in/out)
$0.1 / $0.4
Modalities
text · vision
Benchmark results
Bar shows position within the tracked field; marker = field best
Aider PolyglotCoding9.8%#40
best: Claude Opus 4.5 · 89.4%
AIMEMath29.4%#135
best: GPT-5.2 · 100.0%
GPQA DiamondReasoning50.3%#190
best: GPT-5.6 · 94.6%
IFEvalReasoning74.5%#106
best: Gemma 4 26B A4B · 98.5%
MathVistaVision56.2%#48
best: Seed 2.1 Pro · 90.7%
MMLUKnowledge80.1%#90
best: OpenAI o3 · 92.9%
MMMLUKnowledge66.9%#45
best: Gemini 3.1 Pro · 92.6%
MMMUVision55.4%#84
best: Claude Fable 5 · 89.3%
Run it locally
Closed weights — available via API only. No local deployment.
Input / M tok
$0.1
Output / M tok
$0.4
GPT-4.1 family
Elo progression across releases
GPT-4.1Apr 20251466.6GPT-4.1 miniApr 20251285.7GPT-4.1 nanoApr 2025887.9
Resources
DOCSdevelopers.openai.comAPIAvailable via OpenAI API
API price $0.1/$0.4 · each benchmark row carries its own source badge (see methodology)