GPT-6
First release date not stated by any sourceNo recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-6.
Model creator
OpenAI
Creator of the GPT-4.1 API family and the GPT-5 line (GPT-5, GPT-5.4, GPT-5.5, and the current GPT-5.6 family of Sol, Terra, and Luna).
10 familiesChecked Aug 18, 2026
Featured ecosystems
Recorded lineage, creator by creator
Nesting shows a recorded predecessor Model Passport
GPT-5.6
First released Jul 9, 20260 recorded lineage links in this family.
No creator statement of what these 4 variant names mean is recorded for GPT-5.6.
GPT-5.5
First released Apr 23, 2026No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-5.5.
GPT-Image
First released Apr 21, 2026No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-Image.
GPT-5.4
First released Mar 5, 2026No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-5.4.
GPT-5.3-Codex
First released Feb 5, 2026No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-5.3-Codex.
GPT-5.2
First released Dec 11, 2025No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-5.2.
GPT-5.1
First released Nov 13, 2025No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-5.1.
GPT-5
First released Aug 7, 2025No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for GPT-5.
GPT-4.1
First released Apr 14, 20250 recorded lineage links in this family.
No creator statement of what these 3 variant names mean is recorded for GPT-4.1.
Families without a featured release are not drawn here. Every record in the catalog, featured or not, is listed in the model index and the Model Tree.
Official record
The organization's own surfaces, and the verification date these facts were last checked against them.
- Website
- https://openai.com/
- Release page
- https://openai.com/news/product-releases/
- Type
- company
- Verified
- Aug 18, 2026
Releases
Every release recorded for OpenAI, current and legacy alike. Filter by lifecycle status; the choice is kept in the page address so it survives a reload or a shared link.
Showing all 15 releases.
- GPT-6 Astra Available
- GPT-5.6 Cyber Available
- GPT-5.6 Luna Available
- GPT-5.6 Sol Available
- GPT-5.6 Terra Available
- GPT-5.5 Legacy
- GPT-Image-2 Available
- GPT-5.4 Legacy
- GPT-5.3-Codex Available
- GPT-5.2 Legacy
- GPT-5.1 Legacy
- GPT-5 Legacy
- GPT-4.1 Available
- GPT-4.1 mini Available
- GPT-4.1 nano Available
Primary sources
The organization-level sources behind the summary above.
- official announcementIntroducing GPT-4.1 in the API
OpenAI | Published Apr 14, 2025 | Checked Sep 1, 2026
- official announcementGPT-5.6: Frontier intelligence that scales with your ambition
OpenAI | Published Jul 9, 2026 | Checked Aug 18, 2026