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OpenAI · Efficient

GPT 5.4 Nano

Added Mar 17, 2026

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Use in the app

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.

  • Reasoning
  • Tools
  • Vision
  • Structured output
  • PDF input
Input
Text, Images
Output
Text
Reasoning effort
none · low · medium · high · xhigh
Discovery tier
Efficient

Pricing

USD per 1M tokens
Input
$0.20
Output
$1.25
Cache read
$0.02

Reference prices as published by the model provider. API example

Specifications

Context window
400K
Max output
128K
Average output (7 days)
515 tokens
Longer than 49% of 465 models

Side by side

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Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

Intelligence Index

11.7

Better than 26% of 326 scored models

3.8Catalog models by score55.1

Document reasoning

  • AA-LCRv1.1

    29.7%

    Reasoning across long documents

    Better than 13% of 309 scored models

Reasoning and knowledge

  • Humanity’s Last Exam

    4.1%

    Expert-level questions across academic fields

    Better than 7% of 323 scored models

  • GPQA Diamond

    55.8%

    Graduate-level science questions

    Better than 13% of 291 scored models

  • IFBench

    32.7%

    Following precise output instructions

    Better than 11% of 215 scored models

Legacy evaluations

  • Terminal-Bench Hard

    24.2%

    Earlier terminal task suite

    Better than 45% of 212 scored models

  • τ²-Bench Telecom

    34.8%

    Tool use in a customer-support simulation

    Better than 28% of 214 scored models

  • AA-LCR (unversioned)

    29.7%

    Long-context reasoning, earlier grading

    Better than 13% of 309 scored models

Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Request success (24h)
100.0%
Reliable
Hourly request success · last 72 hoursLowest hour 100.0%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.4-nano",
    "reasoning_effort": "medium",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="openai/gpt-5.4-nano",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

OpenAI

Other OpenAI models, starting with the same family.