# GPT-6 Luna, unlimited in SelGPT

By the SelGPT team. Updated October 1, 2026. Source: https://selgpt.app/models/gpt-6-luna

GPT-6 Luna is OpenAI’s fast everyday model. In SelGPT it is unlimited on every paid plan, within fair use, so it’s the one to reach for most of the time.

> GPT-6 Luna is a fast, low-cost model from OpenAI for everyday questions, writing, summaries and reading files and images. SelGPT includes it unlimited within fair use on Plus and Pro, from $9.99 a month billed yearly, and it can search the web and show its sources.

## What GPT-6 Luna is good at

- Answering questions, with web search and sources when the answer depends on recent information.
- Writing and rewriting emails, posts and documents.
- Summarising long PDFs and documents into the points that matter.
- Reading images and screenshots you upload.

## Try asking

- “Summarize this 40-page PDF in five bullet points.”
- “Rewrite this email so it sounds friendly but firm.”
- “What changed in the news about this today? Show your sources.”

[See plans](https://selgpt.app/pricing)

## Questions

### Is GPT-6 Luna unlimited in SelGPT?

Yes, on Plus and Pro, within a daily fair-use limit. It keeps working even after your monthly allowance for the other models runs out.

### Who makes GPT-6 Luna?

OpenAI. SelGPT gives you access to it alongside models from other labs.

## Related

- [AI for writing](https://selgpt.app/ai-for-writing): Draft, rewrite and polish emails, essays, posts and reports with SelGPT, an AI writing assistant with GPT-6.1, Claude, Gemini and more, web search and no ads.
- [Chat with PDF](https://selgpt.app/chat-with-pdf): Upload a PDF to SelGPT and ask questions about it, get a summary, or pull out the key points, figures and dates. Free to try.
- [Models](https://selgpt.app/models): Every model in SelGPT: GPT-6 Luna, Claude Opus 5.5, GPT-6.1 Sol, Gemini 3.8 Flash, Kimi K3, DeepSeek, MiMo, GLM and Qwen, in one chat.
- [Claude Opus 5.5](https://selgpt.app/models/claude-opus-5-5): Use Anthropic’s Claude Opus 5.5, ranked #1 on the Artificial Analysis Intelligence Index, in SelGPT Plus from $9.99 a month billed yearly.
- [GPT-6.1 Sol](https://selgpt.app/models/gpt-6-1-sol): Use OpenAI’s GPT-6.1 Sol in SelGPT for writing, analysis and code, alongside Claude, Gemini and Kimi, from $9.99 a month billed yearly.
- [Gemini 3.8 Flash](https://selgpt.app/models/gemini-3-8-flash): Use Google’s Gemini 3.8 Flash in SelGPT for research and long documents, alongside GPT-6.1, Claude and Kimi, from $9.99 a month billed yearly.