OpenAI: GPT-5.4

proprietary

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system.

Intelligence
Reasoning
Speed
Context
1.1M
Max output
128K
Input price
$2.5/1M tokens
Output price
$15/1M tokens

Capabilities

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

Details

Model IDopenai/gpt-5.4
Provider OpenRouter
Creator OpenAI
Familygpt-5.4
Licenseproprietary
Statusactive
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window1.1M tokens
Max input—
Max output128K tokens
Reasoning tokensYes
Knowledge cutoff
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$2.5
Output
$15
Cache write
—
Cache read
$0.25
Batch in
—
Batch out
—

Family Comparison: gpt-5.4

ModelContextMax outPricing
OpenAI: GPT-5.4 Nano (batch)400K128K$0.1$0.63
OpenAI: GPT-5.4 Nano400K128K$0.2$1.25
OpenAI: GPT-5.4 Mini (batch)400K128K$0.38$2.25
OpenAI: GPT-5.4 Mini400K128K$0.75$4.5
OpenAI: GPT-5.4 (batch)1.1M128K$1.25$7.5
OpenAI: GPT-5.41.1M128K$2.5$15
OpenAI: GPT-5.4 Image 2272K128K$8$15
OpenAI: GPT-5.4 Pro (batch)1.1M128K$15$90
OpenAI: GPT-5.4 Pro1.1M128K$30$180

API

GET/v1/models/openrouter/openai/gpt-5.4

OpenAI: GPT-5.4

openai/gpt-5.4

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system.

Changes · 3 entries
openai/gpt-5.4update1cd659eMar 24, 2026, 04:19 AM
capabilitiesjson modeyes
openai/gpt-5.4update2b100acMar 23, 2026, 05:30 AM
model_typechat
release_date2026-03-05
taglineGPT-5.4 is OpenAI’s latest frontier model, unifying the C...
tools["function_calling"]
openai/gpt-5.4create7f5c66fMar 21, 2026, 05:16 AM