ChatGPT Free (OpenAI)
ChatGPT Free (OpenAI) No signup
The catch: Signed-out use keeps no history and has no image creation or uploads. Chats are used for training unless you turn off 'Improve the model for everyone', and ads may appear in some countries. Tool limits are unpublished.
| Access | No signup |
|---|---|
| Free limits | Without an account at chatgpt.com: one conversation at a time and no saved history; image creation, uploads and deep research need a login. With a free account: unlimited everyday text chats with GPT-5.6 Luna, subject to abuse safeguards; uploads, image generation, voice and data analysis have separate unpublished limits. |
| Modality | text, code, image, audio |
| Credit card | Not required |
| Commercial use | – |
| Trains on your data | Yes, on the free tier |
| Licence or terms | OpenAI Terms of Use and Privacy Policy |
| Context window | – |
| Model id | – |
| Base URL | – |
| Last checked | 8 Oct 2026 |
How to use GPT-5.6 Luna
Use it in the browser; there is no API.
Paste into Claude Code
I want to use the free AI model "GPT-5.6 Luna" from ChatGPT Free (model id: see the provider docs) without signing up. Please: 1. Check the provider docs and give me a minimal working request that needs no key. 2. Tell me the real limits and any catch (commercial use, data use, logging). Listed limits: No account needed; unlimited text chat when signed in. 3. Tell me what changes if I get a free key, and when I should.
Before you ship on it
- Signed-out use keeps no history and has no image creation or uploads. Chats are used for training unless you turn off 'Improve the model for everyone', and ads may appear in some countries. Tool limits are unpublished.
- Prompts on the free tier may be used to train models. Keep customer data off it.
- OpenAI Terms of Use (effective 1 Jan 2026): you 'own the Output' and OpenAI assigns its rights in Output to you. No explicit commercial-use clause for the Free tier.
- Free tiers are shared capacity: treat the limits as a ceiling, not a promise, and keep a paid fallback.
Questions
Is ChatGPT Free (OpenAI) free?
Yes. ChatGPT Free offers it as no signup, with these limits: No account needed; unlimited text chat when signed in. No credit card is needed.
Can I use ChatGPT Free (OpenAI) commercially?
The provider’s terms do not say. Ask them before you build a product on it.
How do I start with ChatGPT Free (OpenAI)?
Use it in the browser; there is no API.
Source: help.openai.com/en/articles/9275245-chatgpt-free-tier-faq, checked 8 Oct 2026.