Its benchmarks are comparable to Fable 5, with each having its strengths and weaknesses, resulting in a near tie.

Terminal Bench 2.1: 72.1 → 87.9, surpassing Opus 4.8's 85.0, and only 0.1 away from Fable 5's 88.0.

Cybergym: 52.7 → 83.3, surpassing Opus 4.8's 78.3, and slightly higher than Fable 5's 83.1.

DeepSWE: 12.8 → 62.7, surpassing Opus 4.8's 58.0.

AutomationBench: 12.8 → 31.8, surpassing Opus 4.8's 27.2 and Fable 5's 29.1.

Agents' Last Exam: 16.5 → 25.7, catching up with Opus 4.8.

The change in DeepSWE is particularly striking; the Preview score was only 12.8, but by August 13th it had reached 62.7.

The official version of DS4P features significant improvements in agent capabilities, and harness functionality is currently in testing and is said to release soon.

The price remains unchanged, but the official documentation page is no longer accessible.