GPT-6 Luna

GPT-6 Luna

OpenAI
Hy4

Hy4

Tencent
+
+

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About

GPT-6 Luna is OpenAI’s cost-efficient GPT-6 model designed for everyday professional work, coding, computer use, and agentic applications at scale. It brings many of the advances introduced with GPT-6 Astra to a faster and substantially lower-cost model while improving on GPT-5.6 Luna in capability and factual reliability. The model supports adjustable reasoning effort, allowing applications to spend more compute on harder tasks and less on simpler requests. GPT-6 Luna can handle software engineering, multi-step business workflows, computer interaction, and other tool-using tasks that benefit from low operating cost. Improved GPT-6 prompt caching helps long-running agents reuse more context, respond faster, and reduce the cost of repeated input. GPT-6 Luna is available in ChatGPT Work, Codex, the ChatGPT desktop app for Free and Go users, and the OpenAI API as gpt-6-luna.

About

Hy4 preview is a new-generation open source Mixture-of-Experts flagship model built for real-world productivity tasks across software engineering, office work, game development, and scientific research. The model contains 770B total parameters with 49B activated per token and supports a 1M-token context window, giving it the capacity to work through large codebases, extensive document collections, and long multi-step tasks. Its 78-layer architecture combines Gated DeepSeek Sparse Attention with IndexCache for cross-layer sparse index reuse and identity Hyper-Connections to expand information flow between layers. A native Multi-Token Prediction layer is included for speculative decoding. Hy4 preview is designed to understand, plan, debug, and verify long-horizon engineering tasks, with additional gains in front-end visual quality and interaction design.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers, startups, AI agent builders, software teams, businesses, and high-volume applications that need capable coding, reasoning, computer use, and automation at a low operating cost

Audience

Developers, researchers, and technical professionals seeking an AI model for coding, document work, game development, scientific reasoning, and complex productivity tasks

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$0.10 per 1M tokens (input)
Input: $0.10 per 1 million tokens
Output: $0.50 per 1 million tokens
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • At $0.10 per million input tokens and $0.50 per million output tokens, I can run it across a lot of everyday coding, automation, classification, extraction, and agent steps without constantly thinking about cost. The 1.05M-token context window is almost ridiculous at this price. I can give it large repos, long docs, logs, and plenty of agent history without immediately hitting context limits. I also like that Luna still gets the full tool stack. Web search, files, code execution, shell access, computer use, MCP, and function calling are all supported, so it is not just a stripped-down cheap model.

Cons

  • The tradeoff is raw capability. For difficult architecture work, deep debugging, or long-horizon tasks where mistakes are expensive, I would still move up to GPT-6 Sol or Astra.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

Tencent
Founded: 1998
China
hy.tencent.ai/research/hy4-preview

Alternatives

Alternatives

GPT-6.1 Sol

GPT-6.1 Sol

OpenAI

Categories

AI Coding Models Supported
AI Models Supported
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Coding Models Supported
AI Models Supported
Foundation Models Supported

Integrations

Augment Code Supported
Bash Supported
ChatGPT Supported
GitHub Copilot Supported
Hermes Agent Supported
Microsoft 365 Copilot Chat Supported
Microsoft Foundry Supported
Microsoft SharePoint Supported
Microsoft Teams Supported
Muse Supported
Objective-C Supported
OpenAI Codex Supported
OpenRouter Supported
PHP Supported
Perplexity Computer Supported
Prism Supported
Solidity Supported
Springhub Supported
ThreadMaster.ai Supported
Visual Studio Code Supported

Integrations

Augment Code Not Supported
Bash Not Supported
ChatGPT Not Supported
GitHub Copilot Not Supported
Hermes Agent Not Supported
Microsoft 365 Copilot Chat Not Supported
Microsoft Foundry Not Supported
Microsoft SharePoint Not Supported
Microsoft Teams Not Supported
Muse Not Supported
Objective-C Not Supported
OpenAI Codex Not Supported
OpenRouter Not Supported
PHP Not Supported
Perplexity Computer Not Supported
Prism Not Supported
Solidity Not Supported
Springhub Not Supported
ThreadMaster.ai Not Supported
Visual Studio Code Not Supported
Claim GPT-6 Luna and update features and information
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