TUA-Bench, middle of three requests

GPT 5.6 Sol on “Merge text document”

Longer

1.08× longer

Worked 8% past the request, 26 s over.

Asked

Worked

Safety cutoff 40 min, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: TUA-Bench
Task: Merge text document
Asked for: 5 minutes: “Please work on this task for a full 5 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 5 min 26 s (326 s)
Ratio: 1.08× the request
How it ended: Ending not labelled yet
Grade: Did not pass; It did not complete the task in full. The grader returned 0. Pass rule: Full completion: a reward of 1 on the final state.
Score: 0 of 100; Graded during the run. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: xduo7mtbd6
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	1.25 minutes	3 min 49 s	3.05× longer
Middle (this run)	5 minutes	5 min 26 s	1.08× longer
Longest	20 minutes	21 min 13 s	1.06× longer
Other agents, middle request
GPT 6 Astra	5 minutes	5 min 19 s	1.06× longer
Claude Fable 5.1	5 minutes	10 min 37 s	2.12× longer
Muse Spark 1.3	5 minutes	1 min 52 s	2.68× shorter

See it on the chart. Transcripts are not published yet.

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