GLM 5.3 Flash vs Muse Wonder Full low

Muse Wonder Full low leads on quality and agent time: won 16, tied 3, lost 1, 4 undecided head to head and 1.2× faster; Muse Wonder Full low’s cost wasn’t recorded.

24 tasksData from October 29, 2026

Stet score

GLM 5.3 Flashcodex · high reasoningRank 15 of 16

29.995% range 20.6–40.1

Muse Wonder Full lowmuse · low reasoningRank 1 of 16

72.495% range 60.4–83.342.5 points higher

Other setups

SWE-2 Max

65.1

GPT 6.1 Sol medium

64.1

Opus 5

63.7

Grok 4.7 High

62.1

Pareto 26.9

58.4

Haiku 5.5 max

57.1

GPT 6 Sol medium

57.0

GPT 6 Luna max

49.2

DeepSeek V4.1 Flash

46.9

Haiku 5.5 low+guidance

40.8

Haiku 5.5 low

40.1

Opus 4.8

39.8

Muse control

32.8

GPT 6 Luna low

20.4

Their 95% score ranges don’t overlap.

Cost / task

GLM 5.3 Flash$0.41

Muse Wonder Full lownot recorded

Agent time / task

GLM 5.3 Flash26.7 min

Muse Wonder Full low21.6 min1.2× faster

Quality

Head-to-head matchups

GLM 5.3 Flash won1

Tied34 undecided

Muse Wonder Full low won16

Muse Wonder Full low’s win share 89%, 95% range 77–97%Ties are within judge noise.

Task by task

GLM 5.3 Flash solved 0 tasks that Muse Wonder Full low didn’t, and Muse Wonder Full low solved 4 that GLM 5.3 Flash didn’t. Both solved 8; neither solved 8.

GLM 5.3 Flash only 0

Muse Wonder Full low only 4

stet-commit-5d766ddeEquivalent to the merged fix
stet-43493c52Passed tests
stet-2450ca2dPassed tests
stet-commit-e928166fEquivalent 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. 4 of the 24 tasks are left out because one of the two has no scored result on them.

All 20 compared tasks

Task by task
Task	GLM 5.3 Flash	Muse Wonder Full low	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-66762b4c`	Passed tests	Equivalent to the merged fix	Both
`stet-15439c21`	Passed tests	Passed tests	Both
`stet-commit-5d766dde`	Failed	Equivalent to the merged fix	Muse Wonder Full low only
`stet-43493c52`	Failed	Passed tests	Muse Wonder Full low only
`stet-6f84e978`	Failed	Failed	Neither
`stet-2450ca2d`	Failed	Passed tests	Muse Wonder Full low only
`stet-commit-342d0ac0`	Failed	Failed	Neither
`stet-commit-60a0e6c2`	Failed	Failed	Neither
`stet-commit-5e075641`	Failed	Failed	Neither
`stet-commit-a8716b88`	Failed	Failed	Neither
`stet-commit-e928166f`	Failed	Equivalent to the merged fix	Muse Wonder Full low only
`stet-commit-30506f8e`	Failed	Failed	Neither
`stet-commit-d2ab0c25`	Failed	Failed	Neither
`stet-commit-e41c2e2d`	Failed	Failed	Neither

Side by side

Side by side
Metric	GLM 5.3 Flash	Muse Wonder Full low
Harness	codex	muse
Reasoning effort	high	low
Rank	15 of 16	1 of 16
Stet score	29.995% range 20.6–40.1	72.495% range 60.4–83.3
Solved	9/249 passed, 0 judged equivalent	12/249 passed, 3 judged equivalent
Cost / task	$0.41	not recorded
Agent time / task	26.7 min	21.6 min

See which setup wins on your repo

Stet replays your merged PRs, scores quality above pass/fail, and delivers comparison reports through your agent.

Run it on your repo

About this data

24 tasks, each a merged change replayed from the repo as it was just before the merge.
Data from October 29, 2026.
Both setups come from the same leaderboard run of 16 setups: bmk_d4ba310fdf50db4ccb2092e3.

See all 16 setups on the leaderboard How Stet measures