OpenAI GPT-6.1 Terra System Card - Phage--plasmid Co-evolution: leaderboard
Official OpenAI October 26, 2026 GPT-6.1 Terra system-card addendum; Negative log-likelihood (lower is better). Explicit version/effort/model settings are preserved in the board and row names. Shared Astra-card safety/health rows retain the unchanged GPT-6.1 Sol anchor only; changed older comparison checkpoints are not overwritten. Metric: Negative log-likelihood (lower is better).
Metric: Negative log-likelihood (lower is better). Source: deploymentsafety.openai.com. Saturation forecast: Around May 2028. 5 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-6.1 Terra | 10.82 | #10 |
| 2 | GPT-5.6 Sol | 11.35 | #20 |
| 3 | GPT-6 Astra | 12.58 | #5 |
| 4 | GPT-6 Sol | 12.9 | #17 |
| 5 | GPT-6.1 Sol | 12.95 | #6 |
No result here: #3 Claude Opus 5.5, #8 Gemini 4 Argon, #9 Claude Fable 5.1.
Interactive version: theaggregate.ai/benchmark?slug=openai-gpt-6-1-terra-system-card-phage-plasmid-co-evolution · How It Works · Data refreshed daily, snapshot 2026-10-27.