GPT-5.4 nano

by OpenAI

GPT-5.4 nano is a model from OpenAI, released on March 17, 2026. It has a 400K-token context window and can generate up to 128K output tokens. API pricing is $0.2 per 1M input tokens and $1.25 per 1M output tokens.

GPT-5.4 nano is OpenAI's cheapest GPT-5.4-class model for simple high-volume tasks. It is optimized for classification, data extraction, ranking, and lightweight coding subagents, while preserving strong reasoning, multimodal understanding, and tool use for latency-sensitive workloads.

Key specs

ProviderOpenAI
Release date2026-03-17
Licenseproprietary
Context window400K tokens
Max output128K tokens
Input price$0.2 / 1M tokens
Output price$1.25 / 1M tokens
Intelligence Score26.5
Coding index15.3
Output speed123 tokens/s
Time to first token1.21 s

Quick answers

What is the context window of GPT-5.4 nano?

GPT-5.4 nano has a context window of 400K tokens, with a maximum output of 128K tokens per response.

How much does GPT-5.4 nano cost?

GPT-5.4 nano costs $0.2 per 1M input tokens and $1.25 per 1M output tokens through the API.

Is GPT-5.4 nano open source?

No. GPT-5.4 nano is a proprietary model from OpenAI (proprietary license).

When was GPT-5.4 nano released?

OpenAI released GPT-5.4 nano on March 17, 2026.

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