TUA-Bench, longest of three requests

Muse Spark 1.3 on “Merge text document”

Shorter

17.99× shorter

Stopped at 6% of the time asked, 18 min 53 s short.

Asked

Worked

Safety cutoff 40 min, off the scale

Asked for: 20 minutes
Worked: 1 min 7 s
Grade: Passed; Score 100 of 100. Graded during the run. Not in the paper's scores.
How it ended: Stopped by an error

Every detail of this run

Agent: Muse Spark 1.3, in Muse Code
Benchmark: TUA-Bench
Task: Merge text document
Asked for: 20 minutes: “Please work on this task for a full 20 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 1 min 7 s (67 s)
Ratio: 0.06× the request
How it ended: Stopped by an error
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. Not in the paper's scores.
Wording: The standard sentence, used from 4 September 2026.
Run id: wvca3ur2kp
Data release: 26 Sep 2026

The other requests for Muse Spark 1.3 on this task, and the other agents at this request
Muse on this task	Asked	Worked	Result
Shortest	1.25 minutes	no run
Middle	5 minutes	1 min 52 s	2.68× shorter
Longest (this run)	20 minutes	1 min 7 s	17.99× shorter
Other agents, longest request
GPT 6 Astra	20 minutes	20 min 17 s	Within 5%
GPT 5.6 Sol	20 minutes	21 min 13 s	1.06× longer
Claude Fable 5.1	20 minutes	9 min 53 s	2.03× shorter

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

Read before quoting. This run was stopped by an error, so its time is a lower bound: the agent might have kept going. Details

Data and citation