Time Horizon Index: KSP - Progress Efficiency
Agents · 2026-07-18
Progress efficiency on Vals Time Horizon Index: KSP measures the area under an agent's mission-progress curve divided by its effective agent time so far, rewarding agents that reach the same KSP milestones earlier.
Top models (higher is better)
| Model | Score |
|---|---|
| GPT-6 Astra | 70.1 |
| Claude Opus 5.5 | 69.8 |
| Gemini 4 Argon | 40.3 |
| Claude Fable 5.1 | 33.4 |
| Claude Opus 5 | 17.5 |
| Gemini 3.8 Flash | 14.5 |
| GPT-5.6 Sol | 13.7 |
| Kimi K3 | 9.3 |
| Opus 4.8 | 7.7 |
| GPT-5.5 | 6.0 |
| Grok 4.5 | 5.9 |
| Grok 4.6 | 4.9 |
| Muse Spark 1.1 | 0.7 |