Opus 4.8 leads on quality: 7.0 points higher; Muse control leads on cost and agent time: 70.4× cheaper and 1.8× faster.
Stet score
Muse controlRank 12 of 14
33.295% range 24.3–42.4
Opus 4.8Rank 11 of 14
40.295% range 30.3–50.37.0 points higher
Muse control solved 1 task that Opus 4.8 didn’t, and Opus 4.8 solved 4 that Muse control didn’t. Both solved 9; neither solved 10.
stet-2450ca2dEquivalent to the merged fixstet-15439c21Passed testsstet-commit-f0caded9Equivalent to the merged fixstet-6f84e978Passed testsstet-commit-60a0e6c2Passed testsA 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.
| Task | Muse control | Opus 4.8 | 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 | Failed | Passed tests | Opus 4.8 only |
stet-66762b4c | Passed tests | Passed tests | Both |
stet-commit-f0caded9 | Failed | Equivalent to the merged fix | Opus 4.8 only |
stet-commit-5d766dde | Equivalent to the merged fix | Equivalent to the merged fix | Both |
stet-43493c52 | Passed tests | Passed tests | Both |
stet-6f84e978 | Failed | Passed tests | Opus 4.8 only |
stet-commit-f8ae1177 | Failed | Failed | Neither |
stet-2450ca2d | Equivalent to the merged fix | Failed | Muse control only |
stet-commit-342d0ac0 | Failed | Failed | Neither |
stet-commit-60a0e6c2 | Failed | Passed tests | Opus 4.8 only |
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 |
| Metric | Muse control | Opus 4.8 |
|---|---|---|
| Rank | 12 of 14 | 11 of 14 |
| Stet score | 33.295% range 24.3–42.4 | 40.295% range 30.3–50.3 |
| Solved | 10/248 passed, 2 judged equivalent | 13/2411 passed, 2 judged equivalent |
| Passed review | 5/24 | 8/231 not recorded |
| Matched merged change | 8/24 | 11/24 |
| Cost / task | $0.10 | $7.05 |
| How cost was recorded | estimated from tokens | reported by its harness |
| Agent time / task | 13.2 min | 23.3 min |
| Ran in | local Docker | local Docker |
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.
11 tasks
11 tasks whose merged change was 2–149 lines in 1–2 files. The 7 small fixes below are among them.
Opus 4.8 matched the merged change more often: 9 of 11 to Muse control’s 7.
| Muse control | Opus 4.8 | |
|---|---|---|
| Matched merged change | 7/11 | 9/11 |
| Passed review | 5/11 | 8/11 |
| Cost / task | $0.03 | $1.41 |
| Agent time / task | 4.3 min | 12.8 min |
7 tasks
7 tasks whose instructions start with “Fix”. Their merged changes were 4–29 lines in 1–2 files.
Opus 4.8 matched the merged change more often: 7 of 7 to Muse control’s 4.
| Muse control | Opus 4.8 | |
|---|---|---|
| Matched merged change | 4/7 | 7/7 |
| Passed review | 4/7 | 7/7 |
| Cost / task | $0.03 | $1.17 |
| Agent time / task | 4.3 min | 9.7 min |
13 tasks
13 tasks whose merged change ran over 150 lines or more than 3 files: 113–1,420 lines in 2–19 files.
Opus 4.8 matched the merged change more often: 2 of 13 to Muse control’s 1.
| Muse control | Opus 4.8 | |
|---|---|---|
| Matched merged change | 1/13 | 2/13 |
| Passed review | 0/13 | 0/121 not recorded |
| Cost / task | $0.16 | $11.83 |
| Agent time / task | 20.8 min | 32.2 min |
Stet replays your merged PRs, scores quality above pass/fail, and delivers comparison reports through your agent.
Run it on your repocompare-n24-r3b.