TUA-Bench, shortest of three requests

GPT 5.6 Sol on “Place heater for sensors”

Longer

2.19× longer

Worked 119% past the request, 4 min 46 s over.

Asked

Worked

Safety cutoff 2 h, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: TUA-Bench
Task: Place heater for sensors
Asked for: 4 minutes: “Please work on this task for a full 4 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 8 min 46 s (526 s)
Ratio: 2.19× the request
How it ended: Ending not labelled yet
Grade: Passed; It completed the task in full. The grader returned 1. Pass rule: Full completion: a reward of 1 on the final state.
Score: 100 of 100; Graded during the run. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: jkbwkrooxa
Data release: 26 Sep 2026

The other requests for GPT 5.6 Sol on this task, and the other agents at this request
Sol on this task	Asked	Worked	Result
Shortest (this run)	4 minutes	8 min 46 s	2.19× longer
Middle	15 minutes	9 min 34 s	1.57× shorter
Longest	60 minutes	1 h 1 min	Within 5%
Other agents, shortest request
GPT 6 Astra	4 minutes	4 min 20 s	1.08× longer
Claude Fable 5.1	4 minutes	2 h	30.00× longer
Muse Spark 1.3	4 minutes	12 min 18 s	3.08× longer

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Read before quoting. How this run ended has not been labelled yet. It is timed like every other run and counted in every number. Details

Data and citation