GPT 6.1 Sol medium vs Muse control

GPT 6.1 Sol medium leads on quality and agent time: 32.1 points higher and 1.1× faster; Muse control leads on cost: 11.0× cheaper.

24 tasksData from October 17, 2026

Stet score

GPT 6.1 Sol mediumRank 2 of 14

65.395% range 55.6–74.632.1 points higher

Muse controlRank 12 of 14

33.295% range 24.3–42.4

Their 95% score ranges don’t overlap.

Cost / task

GPT 6.1 Sol medium$1.10

Muse control$0.1011.0× cheaper

Agent time / task

GPT 6.1 Sol medium11.8 min1.1× faster

Muse control13.2 min

Task by task

GPT 6.1 Sol medium solved 4 tasks that Muse control didn’t, and Muse control solved 1 that GPT 6.1 Sol medium didn’t. Both solved 9; neither solved 10.

GPT 6.1 Sol medium only 4

stet-15439c21Passed tests
stet-6f84e978Equivalent to the merged fix
stet-commit-f8ae1177Passed tests
stet-commit-342d0ac0Equivalent to the merged fix

Muse control only 1

stet-2450ca2dEquivalent to the merged fix

A task counts as solved when its tests passed or a judge found the fix equivalent to the merged change, as in the leaderboard’s Solved column. Stet score also weighs code quality, so it can order the two differently.

All 24 compared tasks

Task by task
Task	GPT 6.1 Sol medium	Muse control	Solved by
`stet-3169aefa`	Passed tests	Passed tests	Both
`stet-89dfbc27`	Passed tests	Passed tests	Both
`stet-b28f4fe7`	Passed tests	Passed tests	Both
`stet-232b50ba`	Passed tests	Passed tests	Both
`stet-5276aa3f`	Passed tests	Passed tests	Both
`stet-commit-bbbbae09`	Passed tests	Passed tests	Both
`stet-15439c21`	Passed tests	Failed	GPT 6.1 Sol medium only
`stet-66762b4c`	Passed tests	Passed tests	Both
`stet-commit-f0caded9`	Failed	Failed	Neither
`stet-commit-5d766dde`	Equivalent to the merged fix	Equivalent to the merged fix	Both
`stet-43493c52`	Passed tests	Passed tests	Both
`stet-6f84e978`	Equivalent to the merged fix	Failed	GPT 6.1 Sol medium only
`stet-commit-f8ae1177`	Passed tests	Failed	GPT 6.1 Sol medium only
`stet-2450ca2d`	Failed	Equivalent to the merged fix	Muse control only
`stet-commit-342d0ac0`	Equivalent to the merged fix	Failed	GPT 6.1 Sol medium only
`stet-commit-60a0e6c2`	Failed	Failed	Neither
`stet-commit-5e075641`	Failed	Failed	Neither
`stet-commit-2826765e`	Failed	Failed	Neither
`stet-commit-a8716b88`	Failed	Failed	Neither
`stet-commit-30506f8e`	Failed	Failed	Neither
`stet-commit-87814583`	Failed	Failed	Neither
`stet-commit-d2ab0c25`	Failed	Failed	Neither
`stet-commit-e41c2e2d`	Failed	Failed	Neither
`stet-commit-e928166f`	Failed	Failed	Neither

Side by side

Side by side
Metric	GPT 6.1 Sol medium	Muse control
Rank	2 of 14	12 of 14
Stet score	65.395% range 55.6–74.6	33.295% range 24.3–42.4
Solved	13/2410 passed, 3 judged equivalent	10/248 passed, 2 judged equivalent
Passed review	10/24	5/24
Matched merged change	10/24	8/24
Cost / task	$1.10	$0.10
How cost was recorded	estimated from tokens	estimated from tokens
Agent time / task	11.8 min	13.2 min
Ran in	Daytona sandbox	local Docker

Where each setup is the better choice

The leaderboard’s readings on groups of tasks. Each group holds fewer tasks than the overall standings, so treat these as leads to test on your repo.

Changes up to 150 lines

11 tasks

11 tasks whose merged change was 2–149 lines in 1–2 files. The 7 small fixes below are among them.

Both matched the merged change on 7 of 11.

GPT 6.1 Sol medium passed review more often: 8 of 11 to Muse control’s 5.

Changes up to 150 lines
	GPT 6.1 Sol medium	Muse control
Matched merged change	7/11	7/11
Passed review	8/11	5/11
Cost / task	$0.47	$0.03
Agent time / task	5.8 min	4.3 min

Small fixes

7 tasks

7 tasks whose instructions start with “Fix”. Their merged changes were 4–29 lines in 1–2 files.

GPT 6.1 Sol medium matched the merged change more often: 6 of 7 to Muse control’s 4.

Small fixes
	GPT 6.1 Sol medium	Muse control
Matched merged change	6/7	4/7
Passed review	5/7	4/7
Cost / task	$0.42	$0.03
Agent time / task	5.3 min	4.3 min

Larger changes

13 tasks

13 tasks whose merged change ran over 150 lines or more than 3 files: 113–1,420 lines in 2–19 files.

GPT 6.1 Sol medium matched the merged change more often: 3 of 13 to Muse control’s 1.

Larger changes
	GPT 6.1 Sol medium	Muse control
Matched merged change	3/13	1/13
Passed review	2/13	0/13
Cost / task	$1.63	$0.16
Agent time / task	16.9 min	20.8 min

From the leaderboard’s routing advice

Small fix: to spend less, use GPT 6.1 Sol medium.
Larger change: use GPT 6.1 Sol medium.
Anything else: use GPT 6.1 Sol medium.

See which setup wins on your repo

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About this data

24 tasks, each a merged change replayed from the repo as it was just before the merge.
Data from October 17, 2026.
Both setups come from the same leaderboard run of 14 setups: compare-n24-r3b.

See all 14 setups on the leaderboard How Stet measures