GPT-5.4 Nano

OpenAI· released 17 Mar 2026

openai/gpt-5.4-nano

Input / 1M tokens: $0.2
Output / 1M tokens: $1.25

Context window400K tokens

Longest answer: 128K tokens

reads filereads imagereads texttool callingvisionreasoning

About

GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency...

Details

Lab: OpenAIopenrouter.ai · 3 Oct 2026
Context: 400Kopenrouter.ai · 3 Oct 2026
Input price: $0.2 / 1Mopenrouter.ai · 3 Oct 2026
Output price: $1.25 / 1Mopenrouter.ai · 3 Oct 2026
Max output: 128,000 tokensopenrouter.ai · 3 Oct 2026
Inputs: file, image, textopenrouter.ai · 3 Oct 2026
Open weights: Noopenrouter.ai · 3 Oct 2026

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Sources

openrouter.ai/openai/gpt-5.4-nano· checked 3 Oct 2026