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What is GPT-5.4 nano?

GPT-5.4 nano is a highly efficient and lightweight AI model designed to deliver fast and cost-effective performance for simple and repetitive tasks. As part of the GPT-5.4 family, it focuses on speed and scalability rather than handling deeply complex reasoning workloads. The model is optimized for tasks such as classification, data extraction, ranking, and basic coding support. It is particularly well-suited for applications that require processing large volumes of requests with minimal latency. GPT-5.4 nano provides improved performance over earlier nano models while maintaining a significantly lower cost compared to larger models. It supports essential capabilities like tool integration, structured outputs, and automation workflows. The model is often used as a subagent in multi-model systems, where it efficiently handles smaller tasks while larger models manage more complex operations. This allows developers to design scalable architectures that balance performance and cost. GPT-5.4 nano is ideal for backend processes such as data labeling, content filtering, and information extraction. Its fast response times make it suitable for real-time applications and high-throughput environments. Despite its smaller size, it maintains strong reliability for well-defined tasks. The model can also be integrated into pipelines that require quick decision-making or preprocessing. By focusing on efficiency and speed, GPT-5.4 nano helps reduce operational costs while maintaining productivity. Overall, it is a practical solution for businesses and developers looking to scale AI workloads without sacrificing performance for simpler tasks.

What is GPT‑5.3‑Codex‑Spark?

GPT-5.3-Codex-Spark is a specialized, ultra-fast coding model designed to enable real-time collaboration within the Codex platform. As a streamlined variant of GPT-5.3-Codex, it prioritizes latency-sensitive workflows where immediate responsiveness is critical. When deployed on Cerebras’ Wafer Scale Engine 3 hardware, Codex-Spark delivers more than 1000 tokens per second, dramatically accelerating interactive development sessions. The model supports a 128k context window, allowing developers to maintain broad project awareness while iterating quickly. It is optimized for making minimal, precise edits and refining logic or interfaces without automatically executing additional steps unless instructed. OpenAI implemented extensive infrastructure upgrades—including persistent WebSocket connections and inference stack rewrites—to reduce time-to-first-token by 50% and cut client-server overhead by up to 80%. On software engineering benchmarks such as SWE-Bench Pro and Terminal-Bench 2.0, Codex-Spark demonstrates strong capability while completing tasks in a fraction of the time required by larger models. During the research preview, usage is governed by separate rate limits and may be queued during peak demand. Codex-Spark is available to ChatGPT Pro users through the Codex app, CLI, and VS Code extension, with API access for select design partners. The model incorporates the same safety and preparedness evaluations as OpenAI’s mainline systems. This release signals a shift toward dual-mode coding systems that combine rapid interactive loops with delegated long-running tasks. By tightening the iteration cycle between idea and execution, GPT-5.3-Codex-Spark expands what developers can build in real time.

Media

Media

Integrations Supported

Codex CLI
Codex Security
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw
Brokk
EaseMate AI
Flowise
GPT-5.1-Codex-Max
GitHub
HTML
Java
LobeHub
Microsoft 365 Copilot Chat
Model Context Protocol (MCP)
PHP
PowerShell
Transor
Xcode

Integrations Supported

Codex CLI
Codex Security
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw
Brokk
EaseMate AI
Flowise
GPT-5.1-Codex-Max
GitHub
HTML
Java
LobeHub
Microsoft 365 Copilot Chat
Model Context Protocol (MCP)
PHP
PowerShell
Transor
Xcode

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com

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