OpenAI: GPT-5.4 Nano API
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.
- Context window: 400,000 tokens
- Max output: 128,000 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2026-03-16
- Knowledge cutoff: 2025-08-30
Frequently Asked Questions
What is the context window of GPT-5.4 Nano?
GPT-5.4 Nano supports a context window of up to 400,000 tokens.
Does GPT-5.4 Nano support function calling?
Yes. GPT-5.4 Nano supports tool / function calling.
Does GPT-5.4 Nano support reasoning?
Yes. GPT-5.4 Nano is a reasoning-capable model.
What is the knowledge cutoff of GPT-5.4 Nano?
The knowledge cutoff of GPT-5.4 Nano is 2025-08-30.