What is OpenAI: GPT-5.4 Nano's context window?

OpenAI: GPT-5.4 Nano supports a context window of 400,000 tokens, allowing you to process large documents and maintain long conversations.

How to use OpenAI: GPT-5.4 Nano API via Ofox?

Simply set your base URL to https://api.ofox.io/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

OpenAI: GPT-5.4 Nano

Name: OpenAI: GPT-5.4 Nano
Brand: openai
Price: 0.19999999999999998 USD
Availability: InStock
Rating: 5 (1 reviews)

Chat-20%

openai/gpt-5.4-nano

Compare Try in Playground Get Started

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 use cases such as classification, data extraction, ranking, and sub-agent execution.

Context Window

400K

Max Output Tokens

128K

Released

2026-03-17

Capabilities

VisionFunction CallingReasoningPrompt CachingWeb Search

Available Providers

Azure

Supported Protocols

openaianthropic

Playground

Open in OfoxChat

Chat with this model right here. Conversations live only in this page and are never stored.

Conversations are not saved — leaving or refreshing this page clears them.

Providers

Azure

-20%

Input Tokens

$0.16/M

$0.2/M

Output Tokens

$1/M

$1.25/M

Cache Read

$0.016/M

$0.02/M

Output Image

$32/M

Web Search

$0.035/R

Protocols

openai/v1/chat/completions/v1/responses

anthropic

Code Examples

from openai import OpenAI

client = OpenAI(
    base_url="https://api.ofox.io/v1",
    api_key="YOUR_OFOX_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-5.4-nano",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(response.choices[0].message.content)

Uptime & Status

Benchmarks

LMArena ↗Evaluated as gpt-5.4-nano-high

OpenAI: GPT-5.4 Nano scores 1404 in the Overall category of the LMArena text leaderboard (style control), ranking #121 of 374 models based on 53,078 human preference votes (updated 2026-07-12).

Benchmark scores for gpt-5.4-nano-high on LMArena
Category	Arena Score	95% CI	Rank	Votes
Overall	1404	1400–1408	#121 of 374	53,078
Hard Prompts	1423	1419–1428	#119 of 374	34,785
Coding	1461	1455–1468	#102 of 369	14,887
Math	1427	1415–1439	#84 of 362	2,801
Creative Writing	1337	1329–1345	#159 of 372	8,601
Instruction Following	1388	1382–1394	#127 of 374	17,846
Chinese	1422	1409–1435	#130 of 344	2,723

Source: LMArena · CC BY 4.0 · Updated 2026-07-12 · Methodology ↗ · Ranks compare models within each category of the LMArena text leaderboard (style control). Scores come from third-party human preference evaluations, not from OFOX.