GPT-5 Nano

Ultra-fast, ultra-affordable GPT-5

GPT-5 Nano is OpenAI's smallest and fastest model, optimised for simple classification, extraction, and auto-complete tasks where sub-second latency is critical.

Try GPT-5 Nano

Specifications

Context window128k tokens

Input price$0.400 / 1M tokens

Output price$1.60 / 1M tokens

Credits per query2 cr

Released2025-04

LicenseProprietary

Features

Tool useJSON modeFunction calling

Benchmark Scores

What do these mean?

Sourced from official model cards and academic papers. Higher is better.

GPQA Diamond

PhD-level science & reasoning

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AIME 2024

Mathematical olympiad problems

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Arena Elo

Chatbot Arena human preference ranking

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HumanEval

Python coding — pass@1 rate

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MATH

Competition-level mathematics

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MMLU

General knowledge across 57 academic domains

82%

MT-Bench

Multi-turn instruction following (out of 10)

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SWE-Bench

Real-world GitHub issue resolution rate

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