Record 629d9a9c4a81431998a2e80f1331953b

FAIL

Verdict and provenance first; raw prompt/response/reasoning below, collapsed.

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✕FAILanswered "mail room" · model gpt-oss-120b

finish_reason: stop · tokens in/out: 334/302 · cost: $0.000231 · latency: 4387.3 ms

belieftemplatestop

verifier_detail: kind=belief;campaign=1

lineage: 629d9a9c

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Why did it fail? Nemotron 3 Ultra · live on Nebius Token Factory

Ultra reads the prompt, this answer, the verified correct answer and the difficulty settings, then explains the mistake. The verifier's own classification is shown next to it for comparison.

Prompt 1,008 chars · 334 tokens in

At 8:00, Roman moved the narrow wrench into the south stairwell. At 8:01, he moved the narrow wrench into the reception area. At 8:02, Nolan took the narrow wrench and placed it in the conference room. At 8:03, Roman took the narrow wrench and placed it in the photo studio. At 8:04, Nolan carried the narrow wrench to the mail room. At 8:05, Gideon brought the narrow wrench over to the reception area. At 8:06, Roman brought the narrow wrench over to the greenhouse. At 8:07, Gideon took the narrow wrench and placed it in the server room. At 8:08, he brought the narrow wrench over to the south stairwell. At 8:09, Roman carried the narrow wrench to the cafeteria. At 8:10, Gideon moved the sturdy basket into the east wing. At 8:11, Roman carried the sturdy basket to the meditation room. At 8:12, Gideon reorganized some papers on the desk. At 8:13, Nolan refilled a cup of coffee.

Where does Nolan believe the narrow wrench is? Answer with only the location name (or 'unknown' if they have no belief).

Response 302 tokens out · finish: stop

mail room

Reasoning 1,376 chars

Model reasoning

We need to infer Nolan's belief about the location of the narrow wrench based on the events and possibly theory of mind. We have a sequence of actions by multiple agents. We need to consider what Nolan knows. At each time, we need to consider what information Nolan has observed. Usually, unless specified, each person only knows their own actions and possibly sees others? The problem likely expects that each person only knows actions they performed or observed if they were present? Not clear. Might be a classic "belief tracking" puzzle where each person only knows actions they performed and maybe they see others moving objects if they are present? The description doesn't specify visibility. Usually, in such puzzles, each person knows all actions unless they are not present. But we have no info about who sees what. Perhaps we assume each person only knows their own actions, and they assume objects stay where they left them unless they observed a move. So Nolan's belief: He last interacted with the wrench at 8:04, moving it to the mail room. After that, he didn't see any further moves. So he would believe it's in the mail room. However, at 8:07, Gideon took it to server room, then 8:08 he brought it to south stairwell, 8:09 Roman carried to cafeteria. Nolan didn't see those. So Nolan's belief remains mail room. So answer: mail room.

Thus answer: mail room.

Realized dims 5

dim	value
context_length	14.0
coreference	3.0
distractors	2.0
entity_state	10.0
temporal	0.0

Latent params 5

param	value
chain_length	10.0
coref_pressure	0.0
distractor_events	2.0
filler_events	2.0
scramble	0.0