LLM Countdowns / OpenAI / GPT-6.1 Luna
OpenAI
GPT-6.1 Luna
Estimated release
Oct 29, 2026
Late Oct 2026
Details
- Status
- GPT-6.1 Sol shipped without a matching Luna; no date announced
- Current model
- GPT-6 Luna, 38.1 on the Intelligence Index, released Sep 22, 2026 ()
- Projected score
- About 41.1 (+3)
- Typical cycle
- About 37 days between releases
Why this date
- Luna has shipped alongside Sol each time so far (GPT-5.6 on Jul 9, GPT-6 on Sept 22), but GPT-6.1 Sol came out on its own
- GPT-6 Luna (38.1 at $0.10/$0.50) is OpenAI's fastest model on Artificial Analysis at about 133 tokens/s
- A 6.1 Luna using the same post-training upgrades as 6.1 Sol (+4.2) seems likely; the projection assumes a smaller +3
- No leak, listing or announcement so far
Source: OpenAI GPT-6 Sol and Luna launch (Sept 22, 2026), DevDay (Sept 29, 2026) & Artificial Analysis release history
More from OpenAI
October 2026
- Oct 29 GPT-6.1 Luna
November 2026
- Nov 10 GPT-6.2 Sol
- Nov 17 GPT-6 Terra
- Nov 19 GPT-6.1 Astra
January 2027
- Jan 20 GPT-7