GPT-5.4 Mini
GPT-5.4 Mini is a image-generation model from OpenAI, released March 17, 2026. GPT-5.4 mini brings the core capabilities of GPT-5.4 to a faster, more efficient model optimized for high-throughput workloads. It supports text and image inputs with strong performance across reasoning, coding,...
by OpenAI · 400K token context window
Best for
- image generation from text
- creative design and ideation
Ways to use GPT-5.4 Mini in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your OpenAI API key. osFoundry discovers GPT-5.4 Mini automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
GPT-5.4 Mini vs similar models
| Model | Org | Params | Context | Input price | Self-host |
|---|
| GPT-5.4 Mini | OpenAI | — | 400K | $ 0.750 /1M | API only |
| Mistral Small 4 | Mistral | — | 262K | $ 0.150 /1M | API only |
| MiMo-V2-Omni | Xiaomi | — | 262K | $ 0.400 /1M | API only |
| Seed-2.0-Lite | ByteDance Seed | — | 262K | $ 0.250 /1M | API only |
Licence
Hosted — usage subject to provider terms — Hosted-only model — usage governed by the provider's API terms. Bring your own provider key.
No weights distributed; usage subject to provider terms.
Frequently asked about GPT-5.4 Mini
How much does GPT-5.4 Mini cost?
GPT-5.4 Mini is metered at $ 0.750 /1M for input, and $ 4.50 /1M for output. Bring your own OpenAI API key — osFoundry passes through provider pricing without markup.
Can I use GPT-5.4 Mini commercially?
Commercial use is allowed with conditions. Hosted-only model — usage governed by the provider's API terms. Bring your own provider key. No weights distributed; usage subject to provider terms.
What is the context window of GPT-5.4 Mini?
GPT-5.4 Mini supports a 400K token context window.
Can I run GPT-5.4 Mini locally?
No — GPT-5.4 Mini is hosted only and accessed via the OpenAI API.
What is GPT-5.4 Mini best at?
GPT-5.4 Mini is well-suited to image generation from text, creative design and ideation.
How do I use GPT-5.4 Mini in osFoundry?
Paste your OpenAI API key in the key dialog (or deploy the open weights for self-hostable models), assign GPT-5.4 Mini to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by OpenAI on March 17, 2026. Source: https://openrouter.ai/openai/gpt-5.4-mini