Pareto 26.9 leads on quality: 18.9 points higher; Opus 4.8 leads on cost and agent time: 1.8× cheaper and 1.7× faster.
Stet score
Opus 4.8Rank 11 of 14
40.295% range 30.3–50.3
Pareto 26.9Rank 5 of 14
59.195% range 48.8–69.218.9 points higher
Opus 4.8 solved 2 tasks that Pareto 26.9 didn’t, and Pareto 26.9 solved 2 that Opus 4.8 didn’t. Both solved 11; neither solved 9.
stet-commit-5d766ddeEquivalent to the merged fixstet-commit-60a0e6c2Passed testsstet-commit-f8ae1177Passed testsstet-2450ca2dPassed 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 | Opus 4.8 | Pareto 26.9 | 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 | Passed tests | Both |
stet-66762b4c | Passed tests | Passed tests | Both |
stet-commit-f0caded9 | Equivalent to the merged fix | Equivalent to the merged fix | Both |
stet-commit-5d766dde | Equivalent to the merged fix | Failed | Opus 4.8 only |
stet-43493c52 | Passed tests | Passed tests | Both |
stet-6f84e978 | Passed tests | Passed tests | Both |
stet-commit-f8ae1177 | Failed | Passed tests | Pareto 26.9 only |
stet-2450ca2d | Failed | Passed tests | Pareto 26.9 only |
stet-commit-342d0ac0 | Failed | Failed | Neither |
stet-commit-60a0e6c2 | Passed tests | Failed | 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 | Opus 4.8 | Pareto 26.9 |
|---|---|---|
| Rank | 11 of 14 | 5 of 14 |
| Stet score | 40.295% range 30.3–50.3 | 59.195% range 48.8–69.2 |
| Solved | 13/2411 passed, 2 judged equivalent | 13/2412 passed, 1 judged equivalent |
| Passed review | 8/231 not recorded | 8/24 |
| Matched merged change | 11/24 | 9/24 |
| Cost / task | $7.05 | $12.47 |
| How cost was recorded | reported by its harness | reported by its harness on 23, estimated from tokens on 1 |
| Agent time / task | 23.3 min | 39.2 min |
| Ran in | local Docker | Daytona sandbox |
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 Pareto 26.9’s 7.
| Opus 4.8 | Pareto 26.9 | |
|---|---|---|
| Matched merged change | 9/11 | 7/11 |
| Passed review | 8/11 | 7/11 |
| Cost / task | $1.41 | $5.74 |
| Agent time / task | 12.8 min | 29.4 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 Pareto 26.9’s 4.
| Opus 4.8 | Pareto 26.9 | |
|---|---|---|
| Matched merged change | 7/7 | 4/7 |
| Passed review | 7/7 | 5/7 |
| Cost / task | $1.17 | $5.42 |
| Agent time / task | 9.7 min | 30.6 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.
Both matched the merged change on 2 of 13.
| Opus 4.8 | Pareto 26.9 | |
|---|---|---|
| Matched merged change | 2/13 | 2/13 |
| Passed review | 0/121 not recorded | 1/13 |
| Cost / task | $11.83 | $18.18 |
| Agent time / task | 32.2 min | 47.4 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.