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Muse Spark 1.3 high vs Pareto 26.9 medium

Pareto 26.9 medium leads on quality: won 19, tied 3, lost 2 head to head; Muse Spark 1.3 high leads on cost and agent time: 124.6× cheaper and 3.0× faster.

24 tasksData from

Stet score

Muse Spark 1.3 highmuse · high reasoningRank 14 of 16

31.995% range 23.5–40.6

Pareto 26.9 mediumclaude-code · medium reasoningRank 7 of 16

57.195% range 47.0–66.725.2 points higher

Their 95% score ranges don’t overlap.

Cost / task

Muse Spark 1.3 high$0.10124.6× cheaper
Pareto 26.9 medium$12.47

Agent time / task

Muse Spark 1.3 high13.2 min3.0× faster
Pareto 26.9 medium39.2 min

Quality

Head-to-head matchups

Muse Spark 1.3 high won2

Tied3

Pareto 26.9 medium won19

Pareto 26.9 medium’s win share 82%, 95% range 69–93%Ties are within judge noise.

Task by task

Muse Spark 1.3 high solved 1 task that Pareto 26.9 medium didn’t, and Pareto 26.9 medium solved 4 that Muse Spark 1.3 high didn’t. Both solved 9; neither solved 10.

Muse Spark 1.3 high only 1

  • stet-commit-5d766ddeEquivalent to the merged fix

Pareto 26.9 medium only 4

  • stet-15439c21Passed tests
  • stet-commit-f0caded9Equivalent to the merged fix
  • stet-6f84e978Passed tests
  • stet-commit-f8ae1177Passed tests

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
TaskMuse Spark 1.3 highPareto 26.9 mediumSolved by
stet-3169aefaPassed testsPassed testsBoth
stet-89dfbc27Passed testsPassed testsBoth
stet-b28f4fe7Passed testsPassed testsBoth
stet-232b50baPassed testsPassed testsBoth
stet-5276aa3fPassed testsPassed testsBoth
stet-commit-bbbbae09Passed testsPassed testsBoth
stet-66762b4cPassed testsPassed testsBoth
stet-15439c21FailedPassed testsPareto 26.9 medium only
stet-commit-5d766ddeEquivalent to the merged fixFailedMuse Spark 1.3 high only
stet-43493c52Passed testsPassed testsBoth
stet-commit-f0caded9FailedEquivalent to the merged fixPareto 26.9 medium only
stet-6f84e978FailedPassed testsPareto 26.9 medium only
stet-2450ca2dEquivalent to the merged fixPassed testsBoth
stet-commit-342d0ac0FailedFailedNeither
stet-commit-f8ae1177FailedPassed testsPareto 26.9 medium only
stet-commit-60a0e6c2FailedFailedNeither
stet-commit-5e075641FailedFailedNeither
stet-commit-2826765eFailedFailedNeither
stet-commit-a8716b88FailedFailedNeither
stet-commit-e928166fFailedFailedNeither
stet-commit-30506f8eFailedFailedNeither
stet-commit-87814583FailedFailedNeither
stet-commit-d2ab0c25FailedFailedNeither
stet-commit-e41c2e2dFailedFailedNeither

Side by side

Side by side
MetricMuse Spark 1.3 highPareto 26.9 medium
Harnessmuseclaude-code
Reasoning efforthighmedium
Rank14 of 167 of 16
Stet score31.995% range 23.5–40.657.195% range 47.0–66.7
Solved10/248 passed, 2 judged equivalent13/2412 passed, 1 judged equivalent
Cost / task$0.10$12.47
Agent time / task13.2 min39.2 min

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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 .
  • Both setups come from the same leaderboard run of 16 setups: bmk_d4ba310fdf50db4ccb2092e3.

See all 16 setups on the leaderboardHow Stet measures