Run Goose on GPT-5.4

by Agentic AI FoundationCoding agentgoose-docs.ai

Goose is an open-source AI agent that goes beyond code suggestions: it installs dependencies, runs and tests code, and automates whole engineering workflows from the terminal or its desktop app. Created by Block and now part of the Linux Foundation's Agentic AI Foundation alongside MCP, it is built to be model-agnostic. Opper ships in its provider list, so you pick Opper, paste your key, and Goose runs on any of 700+ models with a live model list.

Run

Gooseonin

Connect Goose to GPT-5.4

Add Opper in Goose

In Goose (v1.49 or later), run goose configure → Configure Providers → Opper, or in the desktop app open Settings → Models → Configure providers → Opper, then paste your Opper key (stored as OPPER_API_KEY). Then pick GPT-5.4.

Model id

Get your API key

Where you can run it

GPT-5.4 runs on the routes below. Route only to EU providers when your data has to stay in Europe. One route also sells flex and priority processing: the same model at another price, picked per request with service_tier. How service tiers work.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
Azure	EU		No	$2.75	$16.50	$0.28	Not offered on this route	Not offered on this route
OpenAI	US		No	$2.50	$15.00	$0.25

The model

GPT-5.4

by OpenAI

GPT-5.4 is OpenAI's frontier model for complex professional work, with a 1M context window, vision, tool use, structured output, and configurable reasoning.