OpenAI Officially Launches GPT-6 Sol and Luna Dual Models
On September 23, multiple leakers and users reported that OpenAI is gradually rolling out two new GPT-6 series models, GPT-6 Sol and GPT-6 Luna. An official announcement is believed to be imminent, but as of publication OpenAI has not formally confirmed the news, and specific specs and benchmark data remain unavailable.
Confirmed
- The tipster account TestingCatalog said OpenAI is pushing GPT-6 Sol and GPT-6 Luna to ChatGPT, Codex and the API, with screenshots attached.
- Blogger markk and Reddit user ees-h tested and found both models already usable in OpenAI Codex and Work, with corresponding options appearing in the model selection interface.
- Developer danielmac8 said both models appeared in his Codex model selector and predicted an official announcement was coming soon.
- User kimmonismus (relayed by airesearch12) said they could already use both models and promised to publish benchmark data once obtained.
- AI community insider Andrew Curran (relayed by rickasaurus) said OpenAI was launching both models that day, with Sol and Luna rolling out and already available to some users.
Not Yet Confirmed
- There is no official information on the specific specs, capability differences, pricing or benchmark results of GPT-6 Sol and Luna, and no test data has leaked from the posts (kimmonismus said they will publish once they get it).
- The dual codename "Sol (sun) and Luna (moon)" appears only in m5's account; whether OpenAI will adopt it as the official naming remains to be seen.
Why It Matters
- This would be a rare "double launch day" for OpenAI—releasing two flagship models on the same day, which several leakers see as a pattern similar to its past release style. If true, it would mark the GPT-6 series debuting in a dual-model form, directly affecting the ChatGPT, Codex and API ecosystems, making official announcements and first benchmarks worth watching closely.
2026-09-23 ~ 2026-09-23 · 10 related posts
- Episode 1: Azure configs leak GPT-6 Sol, Luna and Astra Minor, fueling OpenAI release rumors(2026-09-21, 33 posts)
- Episode 2: Codex Leak Hints at GPT-6 Luna, Sol Still Missing(2026-09-22, 2 posts)
- Episode 3: OpenAI Officially Launches GPT-6 Sol and Luna Dual Models(2026-09-23, 10 posts)
- Episode 4: OpenAI Launches GPT-6 Sol and Luna at Half the Price(2026-09-23, 46 posts)
Primary sources
- [source] GPT-6 Sol and Luna spotted in OpenAI Codex, release imminent — mark_k · 2026-09-23
- GPT-6 Sol and GPT-6 Luna Appear in Codex Model Picker, Official Reveal Imminent — daniel_mac8 · 2026-09-23
- GPT-6 Sol and GPT-6 Luna are rolling out, OpenAI announcement imminent — rickasaurus · 2026-09-23
- [source] OpenAI reportedly rolling out GPT-6 Sol and GPT-6 Luna on ChatGPT, Codex, and APIs — testingcatalog · 2026-09-23
- Screenshot shows "GPT-6 Sol and Luna" appearing in the interface — scaling01 · 2026-09-23
- Report: OpenAI rolling out GPT-6 Sol and GPT-6 Luna — koltregaskes · 2026-09-23
- GPT-6 Sol and Luna already usable in Codex, early user reports — airesearch12 · 2026-09-23
- [source] OpenAI ships GPT-6 Sol and GPT-6 Luna to API, rolling out in Codex and ChatGPT Work — OpenAIDevs · 2026-09-23
- GPT-6 'Sol' and 'Luna' leak: faster, cheaper OpenAI models with Astra's SOTA advances — mayanicks0x · 2026-09-23
- Leaked Codex usage limits hint at GPT-6 Sol and Luna tiers (unverified) — airesearch12 · 2026-09-23