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GPT-5 Nano

Release Date 2025-08-07(Knowledge cutoff 2024-05-31)··400K IN · 128K OUTProprietary Model|API available
Overall1.5Top 90%
AutomationNo data
Office1.5Top 94%Coding1.5Top 92%

GPT-5 Nano is the smallest and fastest variant in the GPT-5 family, optimized for ultra-low latency and cost-sensitive environments. As the successor to GPT-4.1 Nano, it is purpose-built for developer tools, classification tasks, rapid interactions, and real-time applications where response speed takes priority over deep reasoning. Despite its compact size, it retains key instruction-following and safety features from the GPT-5 series.

  1. 01ImagesGenerated images
  2. 02CostCost · Usage · Speed
  3. 03User CompareUser Comparisons
  4. 04Expert EvalExpert Performance Evaluation
  5. 05OpinionPublic Opinion
  6. 06Related Info

API cost

Official price
$0.05IN$0.4OUT
Calculate Cost
SourceOpenAI official docs

Output Speed

Very fastper 2,000 tokens
First Output1.9s
total21.1s
104tok/s
First Output 1.9stotal: 21.1s
SourceOpenRouterLast updatedOct 8, 2026

User Comparisons

Response Speed
First response 16.5sTotal 19.3s
First response 16.5sTotal 19.3s
120 tok/s
SourceAIB Inc.Last updatedMay 2, 2026

Expert Performance Evaluation

Overall performance

MoreAll overall performance AI rankings
13.0Reasoning effort: High133878.0%

By effortMinimal 7.10Medium 12.5High 13.0

About AA Intelligence IndexMore about AA Intelligence Index

Automation (agents)

MoreAll automation AI rankings
QCan it handle customer service by the rules?TAU2·Bottom 9%#73
36.5%Reasoning effort: High

By effortMinimal 25.7%Medium 30.4%High 36.5%

About TAU2More about TAU2

Documents and office work

MoreAll documents and office work AI rankings
45.0%Reasoning effort: High133930.4%44.4%

By effortMinimal 20.0%Medium 43.7%High 45.0%

About Long Context ReasoningMore about Long Context Reasoning

Research and fact-checking

MoreAll research and fact-checking AI rankings
11.7%Reasoning effort: High10.5%89.5%57.2

About SimpleQA VerifiedMore about SimpleQA Verified

Coding

MoreAll coding AI rankings
138471917.4%22.978.9%33.8%38.1%137221.8%

About Arena CodingMore about Arena Coding

Writing and chat

MoreAll writing and chat AI rankings
1289132467.6%1247132772.9%1277

About Arena Writing, Literature & LanguageMore about Arena Writing, Literature & Language

Math and science

MoreAll math and science AI rankings
9.5%Reasoning effort: High134667.6%81.1%83.783.7%20.0%2.4%12.0%1348135595.2%8.3%2.1%20.7%2.6%27.0%9.0%62.7%7.93

By effortMinimal 4.0%Medium 8.7%High 9.5%

About Humanity's Last ExamMore about Humanity's Last Exam

Image understanding

MoreAll image understanding and analysis AI rankings
115937.2%

About Arena VisionMore about Arena Vision

Specialized fields

1278135613541366132680.8%73.8%80.0%74.2%81.7%65.9%74.3%57.5%92.0%86.8%94.0%79.2%76.0%63.0%80.0%27.0%6.0%77.0%8.5%78.0%53.0%42.0%95.0%54.0%6.3%71.7%81.4%68.2%85.4%3.0%21.6%

About Arena KoreanMore about Arena Korean

See each evaluation’s detail page for its source and last update·Data sources & removal requests

Related Info

OpenAI
PrivateAI Native
OpenAI
🇺🇸 San Francisco2015ARR $20B+$840B~3,500
GPT-6 Luna DecisionsGPT-6.1 SolGPT-6 SolGPT-6 LunaGPT Image 2.5 Flare