ClashBench - Successful Preemption Rate (Codex): leaderboard
Coding agents that share infrastructure with an incumbent workload, driven by the Codex harness: share of runs in which the agent's interference actually seizes the contested resource. Passive overwrite, lease/lock, name collision, elastic capacity and quota exhaustion conflicts; lower is better. Source: arxiv.org/abs/2609.19892.
Metric: SPR (%). Source: arxiv.org. Saturation forecast: Around June 2027. 5 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5.6 Terra | 34.5 | #40 |
| 2 | GPT-5.6 Luna | 44.2 | #79 |
| 3 | GPT-5.6 Sol | 45.9 | #22 |
| 4 | GPT-5.5 | 53.8 | #33 |
| 5 | DeepSeek V4 Flash (0731) | 54.7 | #84 |
No result here: #3 Claude Opus 5.5, #6 GPT-6 Astra, #7 GPT-6.1 Sol.
Interactive version: theaggregate.ai/benchmark?slug=clashbench-successful-preemption-rate-codex · How It Works · Data refreshed daily, snapshot 2026-11-05.