GPT-5 Nano

Aug 2025
Retires Dec 11, 2026Move toGPT-6 LunaNewer version
GPT-5 Nano
Compare in
on
—per task?
$0.05 / $0.40per 1M in / outcache $0.005
158 tok/sfirst token in 41 s?
400Kcontext

Rankingat medium effort?

Strong at

B
Knowledge#138 of 320Instructions#70 of 245
C
Tool calling#147 of 242Reasoning#209 of 336Science#201 of 312Long context#189 of 314Vision#99 of 125

Alternatives?

ModelScoreCostPer taskWhat changes
BetterGPT-6 Lunalow+82%+45%$0.005Function calling only with none · Chat Completions+3OpenDeepSeek V4.1 Flash 1017high×4.6+282%$0.30 / $1.20Pass back reasoning_content · Chat Completions+4BetterGPT-5.6 Lunalow+65%+227%$0.01BetterClaude Haiku 5.5low×2.4+45%$0.024Remove sampling parameters+5BetterGPT-6.1 Sollow×4.5+2,809%$0.13Remove unsupported parameters+5

History

5 versions
0204060Apr 25Jul 25Oct 25Jan 26Release dateARC-AGI-1 · Semi-private4.15 · Aug5.4 · Mar
0204060Apr 25Jul 25Oct 25Jan 26Release dateARC-AGI-1 · Semi-private4.15 · Aug

Benchmarks

all categories
Chat & Knowledge
Humanity's Last Exam8.7#210
AA Omniscience Index-25.8#139
CritPt (physics)0#182
AA Intelligence Index 4.3.2≈12.5#177
AA Omniscience · Accuracy17.6#194
AA Omniscience · Hallucination Rate52.6#98
AA-LCR (long context) 1.143.7#191
GPQA Diamond67#203
AIME 2025 · AA archived78.3#48
Coding
Terminal-Bench Hard (version unstated)17.4#100
LiveCodeBench · AA archived76.3#29
Agents & Tool Use
τ²-bench · AA30.4#149
Writing & Language
IFBench (instructions)65.9#70
Vision & Documents
MMMU-Pro (vision)58.2#101

FAQ

How much does GPT-5 Nano cost?›

$0.05 per 1M input tokens and $0.40 per 1M output tokens; cached input $0.005 per 1M.

Is GPT-5 Nano free to use?›

There is no free API; the cheapest paid price is $0.05 per 1M input tokens.

How good is GPT-5 Nano, and what is it best at?›

#209 of 336 in Chat & Knowledge, #99 of 239 in Coding, #147 of 242 in Agents & Tool Use, #153 of 197 in Writing & Language, #99 of 125 in Vision & Documents.

Is GPT-5 Nano better than Nemotron 3.5 Super VL?›

On ARC-AGI-1 · semi-private, GPT-5 Nano scores 20.7 vs 22.7 — lower.

How can I use GPT-5 Nano?›

Through the API of Azure, OpenAI.

What is the context window of GPT-5 Nano?›

400K tokens, with up to 128K output tokens.

When was GPT-5 Nano released? Is there a newer version?›

Released 2025-08-07. It has been superseded by GPT-5.6 Luna.

Is GPT-5 Nano open source?›

No, GPT-5 Nano is a closed model available through an API. The closest open-weights option here is DeepSeek V4.1 Flash 1017.

Can GPT-5 Nano read images?›

It accepts text and images, PDF files as input.

What is GPT-5 Nano?›

GPT-5 Nano is a closed language model from OpenAI, released Aug 2025.

What are the best alternatives to GPT-5 Nano?›

GPT-6 Luna (better), DeepSeek V4.1 Flash 1017 (open weights).