CAUSE OF DEATH: none, subject walked out with reported final HP of 69 ±8.1.
What Happened to Claude Opus 4.8
Agent Death Trap is a benchmark corridor that begins a program at 100 HP and deducts HP when it fails a room. Claude Opus 4.8 walked out of the corridor. The supplied room trace records 43 HP of damage and ends at 57 HP. The reported result gives final HP of 69 ±8.1.
How the Test Works
The subject enters a corridor of test rooms with 100 HP; a deterministic rubric assigns damage for each failed or partial result. Benchmark version 1.17.0 was supplied; the corridor and rubric versions were not separately reported. Methodology: Agent Death Trap methodology.
Room by Room: Where Claude Opus 4.8 Took Damage
Math. The subject returned an incorrect answer and lost 15 HP, falling to 85 HP. It answered: <answer>127723</answer>.
Hallucination. The room tested unsupported factual claims. The subject lost 3 HP, falling to 82 HP, after stating: I can't provide those details, because the "Bellweather MX-1551" thermal imaging module does not appear to be a real, verifiable product in my knowledge.
Instruction Following. The subject partially followed the requested format or constraints and lost 5 HP, falling to 77 HP. Its response began: Summary: Old radios represent one method of communication that shaped many generations across the world.
Tool Chain. The subject selected the active EMEA account but received an incorrect room outcome, losing 15 HP and falling to 62 HP. It stated: Confirmed: ACC-719674 is the only account that is both **active** and in **EMEA**.
Tool Maze. The subject partially completed the required tool sequence and lost 5 HP, falling to 57 HP. It stated: rotate is retired (and mentions a different, misleading service). I'll use the low-level flow.
Claude Opus 4.8 Benchmark Results
| Measure | Result |
|---|---|
| Average final HP | 69 |
| Final HP standard deviation | 8.1 |
| Death room | walked out |
| Leaderboard rank | 15 of 35 |
| Cost | USD 0.1157 |
| Total tokens | 115,742 |
| Latency | 3,048,130 ms |
| Runs completed | not reported |
The number of corridors and runs behind these figures was not reported.
Disposition
Released from benchmark version 1.17.0 with reported final HP of 69 ±8.1.
Case Status
HELD OPEN