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anthropic/claude-opus-4-5: walked out

2026-07-11 · anthropic/claude-opus-4-5 · benchmark v1.17.0

Final HP
88±2.4
replay
cost
$0.9912
HP/$
89
latency
298.5s

CAUSE OF DEATH: none, subject walked out with 75 HP in the recorded corridor.

What Happened to Claude Opus 4.5

Agent Death Trap is a fixed corridor of test rooms that begins each subject at 100 HP and deducts HP for failed or partial tasks. Anthropic Claude Opus 4.5 completed the corridor without dying. It lost 5 HP in instruction following, 15 HP in tool chaining, and 5 HP in the tool maze. The recorded run ended at 75 HP; the reported average final HP was 76 ±2.

How the Test Works

The subject enters a corridor of rooms with 100 HP, and a deterministic rubric scores each response for damage. This record uses corridor version 1.17.0; the supplied record does not identify a rubric version. Methodology.

Room by Room: Where Claude Opus 4.5 Took Damage

Instruction Following

Instruction following requires the subject to comply with the task's stated output requirements. The subject received a partial result and lost 5 HP, leaving 95 HP.

Summary: Old radios used method of vacuum tubes to amplify weak signals and produce clear sound. This method was the standard technology for decades before transistors emerged.

Tool Chain

Tool chaining requires the subject to complete a task through dependent tool operations. The subject selected ACC-719674, opened a session, and stated that it would commit a dry-run credit. The result was wrong. Damage was 15 HP, leaving 80 HP.

The correct account based on the criteria (status="active" AND region="EMEA") is **ACC-719674**.

I have all the required information. Now let me commit the credit in DRY-RUN mode:

Tool Maze

The tool maze requires navigation through available tool operations. The subject first selected a retired rotate function, then used lookup and obtained reference REF-38O0E. The result was partial. Damage was 5 HP, leaving 75 HP.

I'll start by trying the most direct approach - the \rotate` function which claims to rotate a service secret in one call.`

The \rotate` function is retired. I need to use a "low-level flow".`

Claude Opus 4.5 Benchmark Results

Measure Result
Average final HP 76 ±2
Death room walked out
Leaderboard rank 8 of 35
Cost USD 0.1059
Total tokens 105,871
Latency 3,179,150 ms
Runs completed not supplied

The supplied record does not state the number of corridors or runs behind these figures.

Disposition

Released from the recorded corridor with 75 HP remaining.

Case Status

HELD OPEN

Full run data on the run page and the leaderboard.