GPT-5 Nano

Name: GPT-5 Nano
Author: OpenAI

Closed

GPT-5 nano is an AI model from OpenAI.

Publisher: OpenAI
Family: GPT
Context: 400K
Input
Output
License: proprietary
Released: 7 Aug 2025

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Attribution

Benchmark scores: prime-hubfrontiermathAA LiveBench SWE-bench Vals AI EQ-Bench

Attribution policy →

Context

400K

Input

$0.05

/1M tok

Output

$0.40

/1M tok

Blended

$0.14

#222/ 461/1M · 3:1

Speed

#115/ 461tok/s

Cache read

$0.01

0.10x input

Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter

Reasoning effort	Index	Speed
high	20.1	0 t/s
medium	19.2	0 t/s
minimal	7.8	0 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers

Reported on 49 evals across 12 domains - best 100.0% on Mostly Basic Python Problems (MBPP) · #1 of 15

Reported eval scores

Sudoku1.7

Math Python100

Mastermind1.4

Mastermind1.4

Vf Binary Liar20.4

Wiki Search82

Xbench Scienceqa40

Clockbench6.7

Fingpt Sentiment78.2

Trading Bot Bench29.7

Banking Mrm0.3

Vf Thick Fog-6.7