GPT-5.4 Nano

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. The model prioritizes responsiveness and efficiency over deep reasoning, making it ideal for pipelines that require fast, reliable outputs at scale. GPT-5.4 nano is well suited for background tasks, real-time systems, and distributed agent architectures where minimizing cost and latency is essential.

ChatOpenAI400k tokens$0.218 / $1.3626 · 1M

openai/gpt-5.4-nano

Context
400k tokens
Completion cap
128,000
Tools
Yes
JSON
Yes
Released
2026-03-17

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.4-nano",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is GPT-5.4 Nano?
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. The model prioritizes responsiveness and efficiency over deep reasoning, making it ideal for pipelines that require fast, reliable outputs at scale. GPT-5.4 nano is well suited for background tasks, real-time systems, and distributed agent architectures where minimizing cost and latency is essential. GPT-5.4 Nano runs on the Geek Hub API (OpenAI-compatible). Model id: openai/gpt-5.4-nano.
Is GPT-5.4 Nano free?
No. Input is $0.218 per 1M tokens and output is $1.3626 per 1M tokens on Geek Hub (markup included).
What is the context length of GPT-5.4 Nano?
GPT-5.4 Nano has a 400k tokens context window. It supports up to 128,000 completion tokens.
Does GPT-5.4 Nano support tool calling and structured outputs?
GPT-5.4 Nano accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was GPT-5.4 Nano released?
GPT-5.4 Nano was released on 2026-03-17.

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