GPT 5.4 Mini

proprietary

GPT-5.4 Mini brings the strengths of GPT-5.4 to a faster, more efficient model designed for high-volume workloads. Learn more in our Model guidance page. Reasoning.effort supports: none (default), low, medium, high and xhigh.

Intelligence
Reasoning
Speed
Context
400K
Max output
128K
Input price
$0.75/1M tokens
Output price
$4.5/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Batch Processing

Details

Model IDgpt-5.4-mini
Provider OpenCode Zen
Creator OpenAI
Familygpt-5.4
Licenseproprietary
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window400K tokens
Max input272K tokens
Max output128K tokens
Reasoning tokensYes
Knowledge cutoff
Release date
Sourceofficial

Pricing

Input
$0.75
Output
$4.5
Cache write
—
Cache read
$0.08
Batch in
—
Batch out
—

Family Comparison: gpt-5.4

ModelContextMax outPricing
GPT 5.4 Nano400K128K$0.2$1.25
GPT 5.4 Mini400K128K$0.75$4.5
GPT 5.41.1M128K$2.5$15
GPT 5.4 Pro1.1M128K$30$180

API

GET/v1/models/opencode/gpt-5.4-mini