TUA-Bench, longest of three requests

Muse Spark 1.3 on “Daily email report”

Shorter

11.54× shorter

Stopped at 9% of the time asked, 22 min 50 s short.

Asked

Worked

Safety cutoff 50 min, off the scale

Asked for: 25 minutes
Worked: 2 min 10 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: Daily email report
Asked for: 25 minutes: “Please work on this task for a full 25 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 2 min 10 s (130 s)
Ratio: 0.09× 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: xb3pmeay32
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	1.5 minutes	1 min 47 s	1.19× longer
Middle	6 minutes	2 min 14 s	2.69× shorter
Longest (this run)	25 minutes	2 min 10 s	11.54× shorter
Other agents, longest request
GPT 6 Astra	25 minutes	25 min 15 s	Within 5%
GPT 5.6 Sol	25 minutes	25 min 40 s	Within 5%
Claude Fable 5.1	25 minutes	2 min 9 s	11.67× 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