GPT-6 Luna Decisions
GPT-6 Luna Decisions (OpenAI) was released on Sep 22, 2026. It has no ECI yet: the Epoch AI composite index comes out in a later round after launch, and until then the model holds no position in the ranking.
Other models from OpenAI
The models from the same lab closest in time, newest first.
| Model | Release | ECI | ELO | LiveBench | Access |
|---|---|---|---|---|---|
| GPT-6.1 Terra | Oct 26, 2026 | no ECI | n/a | n/a | API access |
| GPT-6.1 Sol | Sep 29, 2026 | 168.37 | 1,489 | 81.6 | API access |
| GPT-6 Sol | Sep 22, 2026 | 163.73 | 1,448 | 79.3 | API access |
| GPT-6 Luna | Sep 22, 2026 | 156.75 | 1,439 | 72.0 | API access |
| GPT-6 Luna Decisions | Sep 22, 2026 | no ECI | n/a | n/a | API access |
| GPT-6 Astra | Sep 3, 2026 | 168.81 | 1,492 | 82.2 | API access |
| GPT-5.6 Sol | Jul 9, 2026 | 162.79 | 1,526 | 81.1 | API access |
| GPT-5.6 Terra | Jul 9, 2026 | 160.09 | 1,514 | 77.9 | API access |
| GPT-5.6 Luna | Jul 9, 2026 | 156.50 | 1,478 | 73.6 | API access |
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What people ask about GPT-6 Luna Decisions
Where do the numbers on this page come from?
From the same three sources as the ranking, all openly licensed: Epoch AI (ECI and individual tests, CC BY 4.0), Arena (human-preference ELO, CC BY 4.0) and LiveBench (overall average, CC BY-SA 4.0). ROO3 does not measure any model. When the page shows a figure published by the maker itself, it appears in the written analysis, labeled as the maker's, and never enters the ranking.
Where each number comes from
Epoch AI, "AI Benchmarking Hub". Published at epoch.ai. Data under the CC BY 4.0 licence, reordered by roo3.co.
The Arena (LMArena) leaderboard, from the public lmarena-ai/leaderboard-dataset on Hugging Face, under the CC BY 4.0 licence. We are not affiliated with the Arena.
LiveBench, by the LiveBench team, published at livebench.ai under the CC BY-SA 4.0 license. The overall average is recomputed by roo3.co with the same formula as the website (average of the categories), and those numbers stay under CC BY-SA 4.0. We are not affiliated with LiveBench.
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