GPT-5.4 mini

Name: GPT-5.4 mini
Price: 0.75 USD
Author: OpenAI

by OpenAI

GPT-5.4 mini 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 $0.75 per 1M input tokens and $4.5 per 1M output tokens.

GPT-5.4 mini is OpenAI's strongest mini model yet for coding, computer use, and subagents. It brings many of the strengths of GPT-5.4 to a faster, more efficient model designed for high-volume workloads, with strong coding, reasoning, multimodal understanding, and tool use.

Key specs

Provider	OpenAI
Release date	2026-03-17
License	proprietary
Context window	400K tokens
Max output	128K tokens
Input price	$0.75 / 1M tokens
Output price	$4.5 / 1M tokens
Intelligence Score	29.9
Coding index	21.4
Output speed	124 tokens/s
Time to first token	2.32 s

Quick answers

What is the context window of GPT-5.4 mini?

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

How much does GPT-5.4 mini cost?

GPT-5.4 mini costs $0.75 per 1M input tokens and $4.5 per 1M output tokens through the API.

Is GPT-5.4 mini open source?

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

When was GPT-5.4 mini released?

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

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