GPT-6 Luna

GPT-6 Luna

OpenAI
OpenAI Bel

OpenAI Bel

OpenAI
+
+

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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

OpenAI Bel is the reported codename of an unreleased artificial intelligence foundation model associated with OpenAI. Unofficial reports describe it as a large-scale pretraining project intended to support future generations of AI models. The project has been linked in speculative reporting to OpenAI's Astra model family and potential successors to GPT-6. Some sources claim that Bel contains more than 10 trillion parameters, although this figure has not been independently verified. OpenAI has not published official technical specifications, benchmark results, or documentation confirming the project's capabilities. Bel is not currently available as a publicly documented model through ChatGPT or the OpenAI API.

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

AI researchers, machine learning engineers, software developers, enterprise AI teams, and organizations evaluating advanced language models

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 Not Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

No images available

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

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

OpenAI
Founded: 2015
United States
openai.com

Alternatives

Alternatives

GPT-6 Astra

GPT-6 Astra

OpenAI
GPT-6.1 Sol

GPT-6.1 Sol

OpenAI
GPT-6 Sol

GPT-6 Sol

OpenAI
GPT-6 Luna

GPT-6 Luna

OpenAI
GPT-6.1 Sol

GPT-6.1 Sol

OpenAI
Kimi K2.5

Kimi K2.5

Moonshot AI

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
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Integrations

Azure OpenAI Service Supported
ChatGPT Canvas Supported
ChatGPT Go Supported
ChatGPT Health Supported
GPT-5.4 nano Supported
GPT-5.5 Thinking Supported
GPT‑5.4‑Cyber Supported
GitHub Copilot Supported
Java Supported
JavaScript Supported
Lorka Supported
Microsoft Copilot Studio Supported
Microsoft Excel Supported
Microsoft Teams Supported
OpenAI Supported
OpenAI Dots Supported
ThreadMaster.ai Supported
Use AI Supported
Wazzap AI Supported
ZeroHuman Supported

Integrations

Azure OpenAI Service Supported
ChatGPT Canvas Supported
ChatGPT Go Supported
ChatGPT Health Supported
GPT-5.4 nano Supported
GPT-5.5 Thinking Supported
GPT‑5.4‑Cyber Supported
GitHub Copilot Supported
Java Supported
JavaScript Supported
Lorka Supported
Microsoft Copilot Studio Supported
Microsoft Excel Supported
Microsoft Teams Supported
OpenAI Supported
OpenAI Dots Supported
ThreadMaster.ai Supported
Use AI Supported
Wazzap AI Supported
ZeroHuman Supported
Claim GPT-6 Luna and update features and information
Claim GPT-6 Luna and update features and information
Claim OpenAI Bel and update features and information
Claim OpenAI Bel and update features and information