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GLM 5.3 Flash high vs Muse Spark 1.3 high

No clear quality winner: Muse Spark 1.3 high won 8, GLM 5.3 Flash high won 3, 13 tied; Muse Spark 1.3 high leads on cost and agent time: 4.1× cheaper and 2.0× faster.

24 tasksData from

Stet score

GLM 5.3 Flash highcodex · high reasoningRank 15 of 16

29.095% range 19.9–39.3

Muse Spark 1.3 highmuse · high reasoningRank 14 of 16

31.995% range 23.5–40.62.9 points higher

A directional read: their 95% score ranges overlap.

Cost / task

GLM 5.3 Flash high$0.41
Muse Spark 1.3 high$0.104.1× cheaper

Agent time / task

GLM 5.3 Flash high26.7 min
Muse Spark 1.3 high13.2 min2.0× faster

Quality

Head-to-head matchups

GLM 5.3 Flash high won3

Tied13

Muse Spark 1.3 high won8

Muse Spark 1.3 high’s win share 61%, 95% range 47–75%Ties are within judge noise.

Task by task

GLM 5.3 Flash high solved 2 tasks that Muse Spark 1.3 high didn’t, and Muse Spark 1.3 high solved 3 that GLM 5.3 Flash high didn’t. Both solved 7; neither solved 12.

GLM 5.3 Flash high only 2

  • stet-15439c21Passed tests
  • stet-commit-f0caded9Passed tests

Muse Spark 1.3 high only 3

  • stet-commit-5d766ddeEquivalent to the merged fix
  • stet-43493c52Passed tests
  • 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
TaskGLM 5.3 Flash highMuse Spark 1.3 highSolved 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-15439c21Passed testsFailedGLM 5.3 Flash high only
stet-commit-5d766ddeFailedEquivalent to the merged fixMuse Spark 1.3 high only
stet-43493c52FailedPassed testsMuse Spark 1.3 high only
stet-commit-f0caded9Passed testsFailedGLM 5.3 Flash high only
stet-6f84e978FailedFailedNeither
stet-2450ca2dFailedEquivalent to the merged fixMuse Spark 1.3 high only
stet-commit-342d0ac0FailedFailedNeither
stet-commit-f8ae1177FailedFailedNeither
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
MetricGLM 5.3 Flash highMuse Spark 1.3 high
Harnesscodexmuse
Reasoning efforthighhigh
Rank15 of 1614 of 16
Stet score29.095% range 19.9–39.331.995% range 23.5–40.6
Solved9/249 passed, 0 judged equivalent10/248 passed, 2 judged equivalent
Cost / task$0.41$0.10
Agent time / task26.7 min13.2 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